The Mutiny

Host: Trading is usually a solitary pursuit. But on a prop desk, it's a team sport — with all the politics, rivalries, and pressure that implies. Today's guest, Captain Marcus, ran a 12-trader proprietary desk in Chicago through the COVID crash. He made a decision that saved his firm millions, but cost him two of his best traders. Marcus, welcome to the Mess Deck.

Marcus: Thanks. This isn't an easy story to tell. I fired friends. I changed careers afterward. But the lessons are important.

Host: Set the scene. Early 2020.

Marcus: We were crushing it. The desk was up 35% in the first two months of 2020. Volatility was rising, and we had strategies designed for exactly that. Our options market-making was printing money. The traders were confident — too confident. I had one guy, let's call him Jake, who was making $100,000 a day. He started sizing up. Another trader, Priya, was running a stat-arb book that had never had a down month. Everyone felt invincible. Including me.

Host: Then COVID hit.

Marcus: March 9, 2020. The market limit-downed at the open. Jake was long gamma — which should have been great — but his position was so large that the bid-ask spreads blew out and he couldn't exit. He lost $400,000 in an hour. Priya's stat-arb book fell apart because correlations went to 1.0. Everything moved together. Her model assumed diversification. There was no diversification. She lost $300,000. By March 16, the desk was down $2.1 million for the month. Our entire year's profit, gone in six trading days.

Host: The traders started turning on each other.

Marcus: It was ugly. Jake blamed Priya for crowding his exit. Priya blamed Jake for spooking the market with his size. Two junior traders were openly questioning my leadership in the Slack channel. One guy stopped showing up for the morning meeting. The desk had become toxic. And I realized: even if the market recovered, the team wouldn't. We had lost trust. We had lost our process. We were just a collection of individuals panicking in the same room.

Host: You made a radical decision.

Marcus: On March 17, I called an all-hands. I told everyone we were shutting down for two weeks. Flat. No trading. No exceptions. The firm had never done this. The partners thought I was crazy. Two traders — Jake and another guy — told me I was overreacting. Jake said: I'm a grown man. I can handle my own risk. I told him: Your risk just became my risk. And I'm not comfortable with it. He quit that afternoon. Priya took a leave of absence. She came back two months later, but she never trusted me again. She left for a competitor in August.

Host: What happened during the two weeks?

Marcus: We rebuilt. I brought in a risk consultant. We rewrote every position limit, every stop rule, every correlation assumption. We stress-tested the book against scenarios that seemed impossible — 50% drawdowns, zero liquidity, total correlation. We added a daily loss limit rule: any trader down 3% in a day stops trading until the next morning. No exceptions. We added a desk-wide circuit breaker: if the desk loses 5% in a day, everyone stops. We also added a mandatory 10-minute meditation before the opening bell. Sounds silly, but it worked. It forced everyone to pause before reacting.

Host: Did the desk recover?

Marcus: Yes. We reopened on April 1. The market was still volatile, but we were prepared. We finished 2020 up 22% — not as good as the 35% we had in February, but respectable. More importantly, no one quit in the second half of the year. The culture changed. We went from a star system to a team system. Individual P&L was de-emphasized. Desk P&L became the metric. It wasn't perfect, but it was sustainable.

Host: You left the firm in 2022.

Marcus: I did. I realized I didn't want to manage traders anymore. I wanted to trade my own account, at my own pace, with no one else's psychology to manage. I now run a two-person operation — me and a junior analyst. We make less money than the prop desk, but I sleep better. The COVID crash taught me that the hardest part of trading is not the market. It's the people.

Host: What would you tell someone running a team?

Marcus: Culture is not a poster on the wall. Culture is what you do when you're losing. When you're winning, everyone is friends. When you're losing, the mask comes off. Build your rules, your trust, and your communication during the good times. Because during the bad times, it's too late.