How A Hedge Fund Actually Manages Risk Day To Day

The Part Nobody Asks About

Most questions I get about running a fund are about returns. What's the strategy, what's the target, what's the edge. Almost nobody asks how risk actually gets managed on a normal Tuesday. That's a mistake, because the daily discipline is what determines whether the good years survive the bad ones.

I run global macro and multi-strategy books, which means I'm exposed to currencies, rates, equities, and commodities at the same time, often in different countries. That kind of exposure sounds exciting. It is mostly bookkeeping and boundaries.

What Risk Management Is Not

It is not a single number on a dashboard. It is not something you check once a week. And it is not a job you can hand entirely to a model, even a good one.

Quantitative risk parameters matter. I set position limits, drawdown thresholds, and correlation checks before I ever put on a trade, not after. But a parameter is only as good as the assumption behind it, and assumptions age badly. A correlation that held for five years can break in a week when a central bank does something unexpected. So the parameters get reviewed constantly, not set once and forgotten.

The Three Questions I Actually Ask

Before any meaningful position goes on, I ask three things.

What is the size relative to the portfolio, not the opportunity? A trade can look enormous in isolation and still be small enough to survive being wrong. Sizing against the whole book, not against how convinced I feel, keeps conviction from turning into overexposure.

What correlates with this if markets move together? In calm periods, a diversified book behaves like a diversified book. In stress periods, correlations often converge toward one. I want to know, before it happens, which of my positions will move the same direction under stress, even if they look unrelated on a normal day.

What is the exit if I'm wrong, and can I actually execute it? Liquidity looks infinite until everyone wants out at once. I only take a position if I know, in advance, how I get out of it in a bad market, not just a good one.

Where Most Funds Get Sloppy

The failure point I see most often isn't the model. It's governance. Someone builds a good process, then makes an exception for a trade they really like. One exception becomes a habit. A habit becomes the actual policy, quietly, without anyone deciding it should be.

Prime brokerage relationships and corporate governance sound like paperwork, but they're the guardrails that stop a good process from eroding one exception at a time. I treat governance meetings the same way I treat position limits: non-negotiable, even when nothing seems wrong that week. Especially then.

The Discipline Is Boring On Purpose

I've had periods of strong absolute returns and periods of volatility that tested every assumption I had. The portfolios that came through both looked the same in one respect: the risk process didn't change shape just because the market did. It's tempting to loosen limits when things are going well and tighten them in a panic when things go badly. Both instincts are wrong. The limits should be set when you're calm, not adjusted based on how the last month felt.

What I'd Tell Someone Building Their Own Process

Write your risk rules down before you need them, not while you're in the middle of a position that's moving against you. Decide your correlation checks and your exit criteria on a quiet day. Markets will test the rules eventually. The point of writing them down early is that you're not negotiating with yourself under pressure.

Risk management isn't the exciting part of asset management. It's the part that decides whether you're still in the game long enough for the exciting part to matter.