On average, U.S. markets have outperformed in the 12 months following a presidential election with no change in party, regardless of which party won or lost.2 We believe, the outperformance likely does not stem from the continuity of political policy but rather likely a reflection that the factors that bolster market performance — macroeconomics, fiscal and monetary policies, corporate earnings, and investor sentiment — likely also helped convince the electorate to keep the same party in power.
That said, we see evidence that some of the political uncertainty in elections has been associated with higher volatility in equity markets. Consistent with this idea of policy uncertainty, we found equity volatility has tracked slightly higher for the 90 days preceding presidential elections than in the 90 days following the election, with the heightened volatility even more pronounced in elections that ended with a party switch.3
We also analyzed the polling in each individual election in the sample period and found that the periods of rising equity volatility were contemporaneous with a tightening in the polling — tightly contested elections have been consistent with higher equity volatility.