Index Trading Risk: Managing Correlated Positions and Drawdowns

Indices can look deceptively safe — "I'm just buying the market" — but there are specific risks unique to index trading that traders underestimate: **1. Correlation cascade risk.** When you're long S&P 500 and Nasdaq simultaneously, you're not diversified — both will fall together in a risk-off event. **2. Gap risk on open.** US equities close at 4 PM EST. Overnight news can cause gaps of 2–3% at the next open. Size positions to survive a 3% gap against you. **3. VIX spike risk.** When the VIX spikes above 25, the math of your stops changes. Normal stops get blown through on high-volatility opens. **4. Earnings and event risk.** A single large-cap miss (Apple, Nvidia, Amazon) can drag the entire index 1–2% overnight. **5. Sizing for futures leverage.** ES futures give 50:1+ leverage implicitly. A 1-lot ES contract controls ~$265,000 of exposure. 1 lot is appropriate for accounts above $30,000. What's your main risk consideration when trading indices?