Stop-Loss Mechanisms in Institutional Trading Systems
Retail traders apply universal hard stops believing this constitutes risk management. Institutional statistical arbitrage uses zero traditional stops, relying on portfolio hedging and position sizing instead. Both can be correct—the error lies in assuming stop-loss implementation should be universal rather than strategy-specific. Optimal stop-loss methodology varies dramatically: trend-following requires wide volatility-adjusted stops, mean reversion demands moderate stops, stat arb often eliminates stops entirely. This strategic approach typically improves Sharpe ratios 15-30% versus naive universal hard stops.