Welcome to The Derivative by RCM Alternatives, where we dive into what makes alternative investments go, analyze the strategies of unique hedge fund managers, and chat with interesting guests from across the investment world. Hosted by RCM Managing Partner, Jeff Malec, join us to take a ride through the world of alternative investments.
What happens when a data-obsessed mind that could have been optimizing portfolios decides to optimize powder days instead? This episode features meteorologist and OpenSnow founder Joel Gratz in a deep dive on snow, skiing, and the science of weather forecasting, told through the lens of someone who treats every incoming storm like a market opportunity.
Joel shares how a childhood obsession with snow days in Pennsylvania led to studying meteorology, moving to Boulder, and eventually creating OpenSnow, essentially a Bloomberg Terminal for skiers chasing powder. He explains the real science behind why some mountains get more snow than others, how local wind and terrain effects work, and why long-range seasonal forecasts are about as reliable as a sell-side price target for planning your ski trips.
Joel and Jeff also explore the realities of climate change and snowpack (warmer temperatures vs. largely unchanged long-term precipitation), how subscription passes like Epic and Ikon affect crowd dynamics, think of it as indexing degrading your alpha, and why niche, bootstrapped businesses like OpenSnow can thrive without trying to own all of weather. They get into powder quality, snow-to-liquid ratios, and why Utah sits in a global sweet spot for both depth and fluff, the true asymmetric bet in skiing. Plus: what makes Japan, British Columbia, and Colorado so special for different kinds of ski experiences. The conversation is equal parts nerdy meteorology, entrepreneurial journey, and pure powder stoke.… SEND IT!
Chapters:
00:00-01:52= Intro
01:18-11:06= From Snow-Obsessed Kid to OpenSnow Founder: Joel Gratz’s Origin Story
11:07-24:18= How OpenSnow Helps You Time Powder (and Why 6‑Month Forecasts Don’t Work)
24:19-39:28=Bad Snow Year or Climate Change? Joel Gratz on Drought, Variability, and the Future of Snow
39:29-49:26= Epic, Ikon, and the Powder Problem: Crowds, Passes, and Chasing Better Ski Days
49:27-01:00:25= Utah, Japan, and the Quest for Perfect Powder: Joel Gratz on Global Snow Quality
01:00:26-01:13:24= Dream Lines and Bucket-List Mountains: Joel Gratz on His Favorite Ski Destinations
01:13:25-01:17:46= Ski Movies, Nostalgia, and Parting Powder Wisdom
From the Episode:
Jeff Masters The Derivative Podcast Episode: Super Storms, Mathematical Modeling, and Hurricane Hunting with Dr. Jeff Masters
Meb Faber’s Top Ski resorts - Japan
Citrini Research AI piece: When Skynet Writes a Substack: The AI Doom Piece That Moved Markets
Don't forget to subscribe toThe Derivative, follow us on Twitter at@rcmAlts andsign-up for our blog digest.
Disclaimer: This podcast is provided for informational purposes only and should not be relied upon as legal, business, or tax advice. All opinions expressed by podcast participants are solely their own opinions and do not necessarily reflect the opinions of RCM Alternatives, their affiliates, or companies featured. Due to industry regulations, participants on this podcast are instructed not to make specific trade recommendations, nor reference past or potential profits. And listeners are reminded that managed futures, commodity trading, and other alternative investments are complex and carry a risk of substantial losses. As such, they are not suitable for all investors. For more information, visitwww.rcmalternatives.com/disclaimer
In this episode of The Derivative, Jeff Malec sits down with Ian Winer, West Point grad and founder of Center 15 Capital, to unpack how modern warfare and national security are being reshaped by drones, AI, and space. Using the recent conflict with Iran as a case study, they explore how cheap one-way attack drones are challenging traditional air defenses, why firing multimillion-dollar interceptors at $15,000 drones is unsustainable, and what a proper layered counter-drone strategy looks like, including jammers, directed energy, and high-powered microwaves. Ian also explains how space-based sensors and AI-driven analysis are shortening the intelligence loop, and walks through Center 15’s investments in companies like Shield AI (autonomy for unmanned systems), Epirus (high-powered microwaves for drone defense), Shift5 (cybersecurity for large platforms), and HawkEye 360 (RF detection from space). They close with what keeps Ian up at night, from attacks on civilian infrastructure to cyber risks, and lighten it up with his Mount Rushmore of military movies, from Full Metal Jacket to Red Dawn(yes, the original)...… SEND IT!Chapters:00:00-01:52= Intro
01:53-08:59 = Early Lessons from the Iran Conflict: Air Dominance, Drones, Interceptors, and Space-Based Intelligence
09:00-18:07= How Cheap Drones Are Reshaping Warfare: Drone Classes, Ranges, and Iran’s One‑Way Attack Systems
18:08-24:05= Iran’s Shahed Drones vs. Western Defenses: Costly Interceptors, Missile Stockpiles, and Broken Defense Incentives
24:06-37:20= From Drone Swarms to Force Fields: Venture Investing in Next‑Gen Counter‑Drone Tech
37:21-46:42= Directed-Energy ‘Force Fields’ and Autonomous Combat Drones: Inside Epirus and Shield AI
46:43-57:32= Cybersecurity for Jets, Trains, and Warships: Inside Shift5, Hawkeye 360, and the New Defense Tech Stack
57:33-01:11:01= How Defense-Focused VCs Back Critical Tech—and What keeps you up at night & the Mount Rushmore of Military moviesFrom the Episode:
When Skynet Writes a Substack: The AI Doom Piece That Moved Markets: https://www.rcmalternatives.com/2026/03/when-skynet-writes-a-substack-the-ai-doom-piece-that-moved-markets/Follow along with Ian on LinkedIn and check out Center15 Capital at center15capital.com for more information!
Disclaimer: This podcast is provided for informational purposes only and should not be relied upon as legal, business, or tax advice. All opinions expressed by podcast participants are solely their own opinions and do not necessarily reflect the opinions of RCM Alternatives, their affiliates, or companies featured. Due to industry regulations, participants on this podcast are instructed not to make specific trade recommendations, nor reference past or potential profits. And listeners are reminded that managed futures, commodity trading, and other alternative investments are complex and carry a risk of substantial losses. As such, they are not suitable for all investors. For more information, visitwww.rcmalternatives.com/disclaimer
In this episode of The Derivative, Jeff Malec is joined by Patrick Kazley of OneRiver explore how long volatility, convexity, trend following, and systematic macro can be combined in a capital‑efficient way to improve equity compounding and protect portfolios from major drawdowns. They discuss crisis “shapes,” why time-based rebalancing often beats intuitive drawdown triggers, how changing volatility microstructure (zero‑DTE, single-name vol, dispersion) creates new opportunities, and why behavioral biases keep most investors under-allocated to positively skewed defensive strategies. Patrick ties it all together with vivid metaphors — from F1 cars and soup vs. salad to sumo wrestlers and the beer boot — and explains how One River’s acquisition of a European alternatives/QIS team fits into their total-portfolio approach..… SEND IT!
Chapters:
00:00-02:21 = Intro
02:22-12:33= From AQR to One River – Patrick’s Background and the Case for Systematic Risk Mitigation
12:34-28:07 = Engines and Brakes – Equity Beta, Skew, and the Power of Convexity
28:08-43:55= Crisis Types, Trend Following, and Building a Total Portfolio Defense
43:56-1:03:04= Visualizing Risk – Crisis Shapes, Rebalancing, and the Math of Convexity
1:03:05-1:16:36= Metaphors, Markets, and M&A – From F1 Cars to Das Boot and One River’s Next Phase
1:16:37-1:28:37= Soup vs. Salad – Total Portfolio Thinking and the Future of One RiverFrom the Episode:
Blog post: A Short History of Market-Moving Middle East Conflicts
OneRiver's WhitepapersFollow along with Patrick and OneRiver on LinkedIn and make sure to check out OneRiver's website www.oneriveram.com
Don't forget to subscribe toThe Derivative, follow us on Twitter at@rcmAlts and our host Jeff at@AttainCap2, orLinkedIn , andFacebook, andsign-up for our blog digest.
Disclaimer: This podcast is provided for informational purposes only and should not be relied upon as legal, business, or tax advice. All opinions expressed by podcast participants are solely their own opinions and do not necessarily reflect the opinions of RCM Alternatives, their affiliates, or companies featured. Due to industry regulations, participants on this podcast are instructed not to make specific trade recommendations, nor reference past or potential profits. And listeners are reminded that managed futures, commodity trading, and other alternative investments are complex and carry a risk of substantial losses. As such, they are not suitable for all investors. For more information, visitwww.rcmalternatives.com/disclaimer
In this episode of The Derivative, host Jeff Malec talks with South African grain spread trader Bruce Sinclair (Brent Trading) about how he went from a farming background to running a spread-focused commodities program trading Chicago grains from a remote game farm in South Africa. Bruce explains, in plain language, how carry and calendar spreads work, why he believes spreads offer a more manageable risk profile than outright futures, and how he enforces a hard 10% annual drawdown limit for investors. They dig into the realities of global grain markets with Brazil, Argentina, China, and geopolitics in the mix, why commodities aren’t the clean inflation hedge many think they are, and how climate and structural changes are reshaping seasonality. Bruce also shares stories from his off-grid life breeding rhinos and rare game, navigating South African politics and crime, and why he thinks 2026 could bring much more volatility to grain markets than 2025… SEND IT!
Chapters:
00:00-00:01:01= Intro
01:02-12:34= From South African Farms to Grain Spreads: How Bruce Built His Ag Trading Edge
12:35-24:22 = Carry Trades, Calendar Spreads, and Risk Rules: Inside Bruce’s Grain Strategy
24:23-33:15= Commodities, Inflation Myths, and the Soybean–Oil–Meal Puzzle
33:16-46:03= Politics, Perception, and Life Off-Grid: Running a Trading Firm from Rural South Africa
46:04-54:53= Weather, Brazil, and the Limits of Data: Why Bruce Still Trusts Spreads
Follow along with Bruce on LinkedIn and be sure to check out Brent Trading's website: brent.za.net!
Don't forget to subscribe toThe Derivative, follow us on Twitter at@rcmAlts and our host Jeff at@AttainCap2, orLinkedIn , andFacebook, andsign-up for our blog digest.
Disclaimer: This podcast is provided for informational purposes only and should not be relied upon as legal, business, or tax advice. All opinions expressed by podcast participants are solely their own opinions and do not necessarily reflect the opinions of RCM Alternatives, their affiliates, or companies featured. Due to industry regulations, participants on this podcast are instructed not to make specific trade recommendations, nor reference past or potential profits. And listeners are reminded that managed futures, commodity trading, and other alternative investments are complex and carry a risk of substantial losses. As such, they are not suitable for all investors. For more information, visitwww.rcmalternatives.com/disclaimer
In this episode of The Derivative, host Jeff Malec talks with uranium analyst Justin Huhn and mining and commodities commentator Trevor Hall of the Going Nuclear podcast about why uranium and nuclear power may be the most compelling long-term solution for clean baseload energy. They dig into the current uranium bull market, how AI and data centers are driving a step-change in electricity demand, what makes the uranium supply–demand setup unique versus oil and gas, and why life extensions of existing reactors matter so much. The discussion also takes its course exploring the future of SMRs and advanced reactors, the realities of nuclear safety and waste, the role of geopolitics and utilities, and what could propel the next major move in uranium prices. SEND IT!
Chapters:
00:00-01:06= Intro
01:07-09:33= Why Nuclear Now? The Case for Clean Baseload Power, AI Demand, and the Uranium Supply Squeeze
09:34-18:37 = Uranium as a Commodity: Mining, Supply Risks, Financial Players, and Long-Cycle Price Dynamics
18:38-28:50= Nuclear Safety, Waste Myths, and Why Fossil Fuels Funded Anti-Nuclear Fear
28:51-39:59= SMRs, Advanced Reactor Designs, and the Costly Lesson of Vogtle
40:00-50:20= SMRs, Military Reactors, and the High Stakes of Building New Nuclear50:21-57:09= Politics, Big Projects, and How Data Centers Are Driving an Energy Crunch57:10-1:03:50= Hyperscalers, Fuel Security, and the Next Uranium Shock
From the episode:
Going Nuclear podcast:
Apple: https://podcasts.apple.com/us/podcast/going-nuclear-with-justin-huhn-and-trevor-hall/id1660633132
Spotify: https://open.spotify.com/show/6QAKNtCsXExOBKV8y6cwCu
Follow along with Trevor and Justin on LinkedIn, check them out on Twitter/X: @TrevAHall / @uraniuminsider, and be sure to visit https://clearcommodity.net/ and https://www.uraniuminsider.com/ for more information!
Don't forget to subscribe toThe Derivative, follow us on Twitter at@rcmAlts and our host Jeff at@AttainCap2, orLinkedIn , andFacebook, andsign-up for our blog digest.
Disclaimer: This podcast is provided for informational purposes only and should not be relied upon as legal, business, or tax advice. All opinions expressed by podcast participants are solely their own opinions and do not necessarily reflect the opinions of RCM Alternatives, their affiliates, or companies featured. Due to industry regulations, participants on this podcast are instructed not to make specific trade recommendations, nor reference past or potential profits. And listeners are reminded that managed futures, commodity trading, and other alternative investments are complex and carry a risk of substantial losses. As such, they are not suitable for all investors. For more information, visitwww.rcmalternatives.com/disclaimer
In this new episode of The Derivative, host Jeff Malec talks with PGIM Quantitative Solutions’ Devang Gambhirwala and Lorne Johnson about managing over $100 billion in quant and multi-asset strategies inside a $1.5 trillion asset manager. They break down the boom in options-based ETFs, from covered calls and defensive equity to buffered and defined-outcome strategies powered by flex options, plus what today’s volatility and rate environment mean for investors. The trio also tackles the impact of AI, fiscal imbalances, and even gold’s renewed role in portfolios. SEND IT!
Chapters:
00:00-00:46= Intro
00:47-07:25= From Newark to Quant: Devang & Lorne’s Paths to PGIM and the Rise of a $100B Quant Group
07:26-17:06 = Inside PGIM QSG: Trillion‑Dollar Roots, Quant Investing 101, and the Rise of AI-Driven Models
17:07-28:30= Options Boom: Democratized ETFs, Flex Options, and the New Era of Defensive Equity
28:31-42:38= Defined Outcomes, Tail Hedges, and Building Portfolios for an Uncertain Macro World
42:39-56:24= AI, Gold, and the Future of Risk: PGIM’s Take on What Comes Next for Markets and Jobs
Follow along with Devang Gambhirwala and Lorne Johnson on LinkedIn and be sure to check our PGIM's website at www.pgim.com for more information!
Don't forget to subscribe toThe Derivative, follow us on Twitter at@rcmAlts and our host Jeff at@AttainCap2, orLinkedIn , andFacebook, andsign-up for our blog digest.
Disclaimer: This podcast is provided for informational purposes only and should not be relied upon as legal, business, or tax advice. All opinions expressed by podcast participants are solely their own opinions and do not necessarily reflect the opinions of RCM Alternatives, their affiliates, or companies featured. Due to industry regulations, participants on this podcast are instructed not to make specific trade recommendations, nor reference past or potential profits. And listeners are reminded that managed futures, commodity trading, and other alternative investments are complex and carry a risk of substantial losses. As such, they are not suitable for all investors. For more information, visitwww.rcmalternatives.com/disclaimer
In this episode of The Derivative, Jeff Malec dusts off the dress shoes and steps out from behind the webcam for his first in-person interview since before COVID. He heads to Potomac's studio to sit down with Dan Russo, Portfolio Manager and CIO, for a conversation on why investing theory often breaks down when real life shows up. This chat covers why market timing isn't about catching every move, it's about avoiding the ones that cause lasting damage. Dan also explains how Potomac applies systematic, rules-based models built on trend, breadth, and intermarket signals, why cash is a position, and why many popular investing slogans oversimplify risk. SEND IT!
Chapters:
00:00-00:19= Intro
00:20-08:05 = Tactical vs. Passive Investing, Education in Investing, & Understanding Market Timing and Drawdowns
08:06-21:47= The Role of Education in Investing & Analyzing Market Trends and Health
21:48-35:32= Combining Technical Analysis with Market insight
35:33-45:22= Advisor relationships, Portfolio management & Market Psychology
45:23-54:56= Cash as a Diversifier, Tactical Strategies & Risk management
54:57-01:01:53= Future directions, Market Adaptation & The Evolution of Trading
01:01:54-01:06:35= Parkerization and Pinot: Hot Takes on the Modern Wine Industry
Don't forget to subscribe toThe Derivative, follow us on Twitter at@rcmAlts and our host Jeff at@AttainCap2, orLinkedIn , andFacebook, andsign-up for our blog digest.
Disclaimer: This podcast is provided for informational purposes only and should not be relied upon as legal, business, or tax advice. All opinions expressed by podcast participants are solely their own opinions and do not necessarily reflect the opinions of RCM Alternatives, their affiliates, or companies featured. Due to industry regulations, participants on this podcast are instructed not to make specific trade recommendations, nor reference past or potential profits. And listeners are reminded that managed futures, commodity trading, and other alternative investments are complex and carry a risk of substantial losses. As such, they are not suitable for all investors. For more information, visitwww.rcmalternatives.com/disclaimer
This week on The Derivative, Jeff Malec is joined by seasoned resource investor Robert Mullin for a reality check on Venezuelan oil and the market narratives surrounding it. They dig into why headlines calling for cheap oil miss the point, what it actually takes to restart a broken energy system, and why “world’s largest reserves” isn’t the bullish mic drop many assume. Along the way, they unpack sanctions, shadow tanker fleets, Gulf Coast refinery hype, and where the real economic constraints lie. It’s a sharp, grounded conversation focused on market structure, logistics, and context, cutting through the noise without relying on forecasts or recommendations. SEND IT!
Chapters:
00:00-00:12= Intro
00:13-12:25 = US Involvement in Venezuelan Oil & Challenges in Venezuelan Oil Production
12:26-20:16= The Role of International Companies & The Shadow Fleet and Sanctions
20:16-28:15= Commodity Cycles and Market Dynamics & Investment Strategies in Resource Equities
28:16-43:27= Investment Strategies in Resource Equities
& Navigating the Resource Sector's Challenges
43:28-49:52= Gold & Precious Metals: Investment Strategies, Central Bank Moves, and Market Dynamics
49:53-59:42= From Base Metals to Nuclear: Equity Strategies and the Future of Resource Investing
59:43-01:07:55= Nuclear Frontiers, Geopolitical Shifts, and the Changing Role of Resources in Global Markets
From the episode:
About those Higher Interest Rates (Lower Bond Prices) - RCM Alternatives Blog post
Follow along with Robert on LinkedIn and check out Marathon's website marathonresourceadvisors.com for more information
Don't forget to subscribe toThe Derivative, follow us on Twitter at@rcmAlts and our host Jeff at@AttainCap2, orLinkedIn , andFacebook, andsign-up for our blog digest.
Disclaimer: This podcast is provided for informational purposes only and should not be relied upon as legal, business, or tax advice. All opinions expressed by podcast participants are solely their own opinions and do not necessarily reflect the opinions of RCM Alternatives, their affiliates, or companies featured. Due to industry regulations, participants on this podcast are instructed not to make specific trade recommendations, nor reference past or potential profits. And listeners are reminded that managed futures, commodity trading, and other alternative investments are complex and carry a risk of substantial losses. As such, they are not suitable for all investors. For more information, visitwww.rcmalternatives.com/disclaimer
Kick off the first episode of 2026 with a fun, draft-style market showdown as host Jeff Malec is joined by David Dziekanski and Zed Francis on The Derivative. Using funky categories and plenty of hot takes, the trio drafts everything from “wait, that’s still a thing” trades to market overreactions, false idols, and narratives that didn’t survive the year. Along the way, they break down crypto cycles, volatility, cash, and derivatives, mixing sharp insight with dry humor and real debate. It’s a loose, fast-paced way to start the year, packed with strong opinions, laughs, and a few bold predictions. SEND IT!
Chapters:
00:00-02:35= Intro
02:36-12:50 = New year reflections, Market Trends and Predictions, Crypto Cycles and The Diminishing importance of Jobs
12:51-20:55= Unsophisticated Investment Strategies, Market overactions and consequences & Correlations in the market
20:56-35:52= Desensitized to Major Events, Future outlooks, Market Indicators, Volatility Trends & Dogs that didn’t Bark - Inflations/Tariffs
35:53-43:28= Are We Sure this is Good? The Affordability Crisis and The A.I. Paradox
43:29-48:03= Best Meals & Entertainment of 2025
48:04-59:41= Looking forward: Predictions for 2026
From the episode:
David on the Derivative:
Zed on the Derivative:
Protecting the Portfolio not with Long Vol, but with Long Gamma, with Convexitas
The Polymath Pod: Jason Buck and Zed Francis talk rates, vol, and cheeseburgers?!
WTF is LDI, and What’s working in Vol Trading with Zed Francis of Convexitas
Follow along on LinkedIn with David and Zed and be sure to check out their websites quantifyfunds.com and convexitas.com for more information!
Don't forget to subscribe toThe Derivative, follow us on Twitter at@rcmAlts and our host Jeff at@AttainCap2, orLinkedIn , andFacebook, andsign-up for our blog digest.
Disclaimer: This podcast is provided for informational purposes only and should not be relied upon as legal, business, or tax advice. All opinions expressed by podcast participants are solely their own opinions and do not necessarily reflect the opinions of RCM Alternatives, their affiliates, or companies featured. Due to industry regulations, participants on this podcast are instructed not to make specific trade recommendations, nor reference past or potential profits. And listeners are reminded that managed futures, commodity trading, and other alternative investments are complex and carry a risk of substantial losses. As such, they are not suitable for all investors. For more information, visitwww.rcmalternatives.com/disclaimer
Join Jeff Malec for a quick, fun season finale as he looks back on the year’s market highlights, standout episodes, and unforgettable guests. The Derivative is heading into a short holiday break, but we’ll be back with fresh conversations and a stacked guest lineup in January. SEND IT!
Episode favs from 2026:
Don't forget to subscribe toThe Derivative, follow us on Twitter at@rcmAlts and our host Jeff at@AttainCap2, orLinkedIn , andFacebook, andsign-up for our blog digest.
Disclaimer: This podcast is provided for informational purposes only and should not be relied upon as legal, business, or tax advice. All opinions expressed by podcast participants are solely their own opinions and do not necessarily reflect the opinions of RCM Alternatives, their affiliates, or companies featured. Due to industry regulations, participants on this podcast are instructed not to make specific trade recommendations, nor reference past or potential profits. And listeners are reminded that managed futures, commodity trading, and other alternative investments are complex and carry a risk of substantial losses. As such, they are not suitable for all investors. For more information, visitwww.rcmalternatives.com/disclaimer
In this episode, Jeff Malec sits down with Tom Holliday, founder and CIO of HIP Investments, for an in-depth conversation on reimagining multi-strategy investing in the commodity space. Tom shares insights from his distinguished career, from his early days at Refco to working with George Soros and launching both Titan Advisors and Hip Investments. Together, they explore the evolution from traditional fund-of-funds to collaborative, actively managed multi-strat funds, highlighting the advantages of diversification, portfolio construction, and innovative incentive structures for specialist traders. The discussion covers risk management tactics, the unique challenges and opportunities of commodity markets, and why institutional investors may be under-allocated to this asset class. Whether you're an investment professional or passionate about alternative strategies, this episode offers valuable perspectives on building resilient, high-performing portfolios in today’s changing markets. SEND IT!
Chapters:
00:00-00:56= Intro
00:57-12:56= Commodities Demand Attention: Navigating Trends, Valuation, and the Road Ahead
12:57-28:27= Foundations of a Commodities Career: From Memphis Markets to Global Futures
28:28-32:15= From Fund of Funds to Multi-Strat: Evolving Models in Investment Management
32:16-44:37=Building HIP: Innovating Multi-Strat Strategies for Commodities
44:38-59:27= Risk, Collaboration, and Incentives: Cultivating a Resilient Commodities Team
59:28-01:13:19= Seizing Commodity Opportunities: Growth, Recruitment, and Market Evolution
01:13:20-01:17:19= Commodities: The Case for Attention and Allocation
Don't forget to subscribe toThe Derivative, follow us on Twitter at@rcmAlts and our host Jeff at@AttainCap2, orLinkedIn , andFacebook, andsign-up for our blog digest.
Disclaimer: This podcast is provided for informational purposes only and should not be relied upon as legal, business, or tax advice. All opinions expressed by podcast participants are solely their own opinions and do not necessarily reflect the opinions of RCM Alternatives, their affiliates, or companies featured. Due to industry regulations, participants on this podcast are instructed not to make specific trade recommendations, nor reference past or potential profits. And listeners are reminded that managed futures, commodity trading, and other alternative investments are complex and carry a risk of substantial losses. As such, they are not suitable for all investors. For more information, visitwww.rcmalternatives.com/disclaimer