
What the Sharpe Ratio Really Measures — and Where It Misleads
The Sharpe ratio measures return earned per unit of risk — the most cited yardstick of risk-adjusted performance. What it captures well, and its four blind spots: it treats gains and losses alike, assumes well-behaved returns, can be inflated by smoothed prices, and stays a noisy estimate. Why a high ratio is a good question, never a verdict.
Jul 18, 2026 · 10 min read



















