They didn't just outperform "normal" congress critters.. they also outperformed nearly every hedge fund on the planet. But they (meaning, of course, just one person and their spouse) are obviously geniuses.
Hedge funds’ goals are often not to maximize profit, but to provide returns uncorrelated with the rest of some benchmark market. This is useful for the wealthy as it means you can better survive market crashes.
They use crazy investment strategies that allow them to capture high returns in adverse general market conditions, but they rather under perform the general market in normal and booming conditions. “Hedge” is actually in their name for a reason. Rich people use hedge funds for…hedging.