Risk Premium

In finance and political economy, the risk premium is the additional yield, return, or interest rate that investors require to hold an asset whose payoff is uncertain, compared to a notionally risk-free alternative such as short-dated US Treasury bills or German Bunds. It is typically expressed in basis points (bps) above the benchmark.

Several distinct risk premia appear in policy analysis:

• Equity risk premium (ERP): the excess return of stocks over government bonds. Long-run estimates for the US generally fall in the 3–6% range, though figures vary by methodology (Damodaran, Dimson-Marsh-Staunton).
• Sovereign risk premium: the spread between a country's government bond yield and a safe-haven benchmark. During the eurozone crisis, Greek 10-year yields exceeded German Bunds by more than 30 percentage points in early 2012.
• Term premium: compensation for holding longer-maturity debt rather than rolling over short-term instruments.
• Credit (default) risk premium: the spread on corporate or sovereign debt reflecting probability of default, often proxied by credit default swap (CDS) prices.
• Currency risk premium: compensation for exchange-rate uncertainty, relevant to emerging-market debt issued in foreign currency.

For governments, the risk premium operates as a real-time market verdict on policy credibility. Rising spreads can constrain fiscal space, force austerity, or trigger central bank intervention—as with the ECB's Outright Monetary Transactions framework announced in 2012 after Mario Draghi's "whatever it takes" speech. Mervyn King and others have argued that risk premia compress during periods of complacency and re-price abruptly during crises, a pattern visible in 2008 and again during the March 2020 dash-for-cash.

Risk premia are not directly observable; they are inferred from yield differentials and model assumptions, which is why estimates differ across analysts.