What Is Risk-Free Rate?
The risk-free rate is the theoretical return on a zero-risk investment — typically the yield on short-term US Treasury bills, which are backed by the full faith of the US government. In crypto, the "risk-free" rate is often approximated by: stablecoin lending rates (5-10% on reputable protocols), staking yields (3-5% on ETH), or Treasury-backed DeFi products.
How Risk-Free Rate Works
The risk-free rate matters because all investment returns should be evaluated relative to it. A strategy returning 10% when the risk-free rate is 5% has only 5% of excess return (alpha). The Sharpe Ratio explicitly subtracts the risk-free rate from total returns before dividing by risk. Higher risk-free rates raise the bar for what constitutes worthwhile trading performance.
Why It Matters for Traders
In the current high-rate environment, crypto strategies must generate returns significantly above 5% (the approximate stablecoin/Treasury yield) to justify the additional risk. A leveraged trading strategy returning 15% with 30% max drawdown is not obviously better than earning 5% risk-free with zero drawdown. This calculation forces honest evaluation of whether active trading adds sufficient value above what passive, low-risk alternatives provide.
