How to deal with insane markets
Line Your Own Pockets
In this episode of Line Your Own Pockets, Michael and Dave tackle the question every systematic trader fears: What do you do when the market suddenly shocks—gapping 3–5% overnight or ripping intraday? Drawing on decades of hands‑on experience (Michael as a swing trader, Dave as a day‑trade specialist), they share concrete tactics to stay disciplined, protect capital, and even thrive in tumultuous conditions.
Key Takeaways
Day‑Trader vs. Swing‑Trader Mindset
Dave (Day): Designs systems so robust he barely checks the SPY on shock days—true “programmer laziness” as a virtue.
Michael (Swing): Monitors overnight gaps to brace for account swings but resists ad‑hoc tweaks to his core strategy.
System Design & Preparation
Back‑Test for Rarity: Add a “SPY Gap” column (or similar regime tags) so you can instantly query how your model handled past big moves.
Rapid‑Response Analytics: Build your back‑test with modular columns—so you can answer volatility questions in minutes, not hours.
Three Ways to React
Full Shutdown: Walk away, preserve mental capital, then post‑mortem with your data.
Full Engage: Let your models run at normal size—capture the massive edge big moves can offer.
Hybrid Approach: Keep core systems on but reduce position sizes or disable only strategies you know are hypersensitive to market–wide shocks.
Risk Management & Psychology
Size Down, Stay in the Game: Even a 25–50% reduction in risk lets you participate without derailing your psyche.
Ignore the Noise: Skip the financial news—treat headlines as lagging indicators, not trading signals.
Mental Capital Allocation: Use off‑market time to develop and test new systems or regime‑switch filters, not worry.
Beyond the Shock: Continuous Improvement
Follow‑Up Analysis: Volatility shocks often cluster—study the following trading days or weeks for fresh high‑edge setups.
Multi‑Strategy Rotation: Maintain a toolkit of uncorrelated models; rotate active strategies based on current regime tags (e.g., “high SPY gap”).