This reminds me of a study which showed that even if you bought the same stocks a month after Buffett and his holding company Berkshire Hathaway disclosed their own purchases, you'd still be way ahead of the game.
"The market ... appears to under-react to the news of a Berkshire stock investment since a hypothetical portfolio that mimics Berkshire's investments created the month after they are publicly disclosed earns positive abnormal returns of 14.26% per year."
But Buffett is a long term investor. I am not sure how long the Pelosis hold their stocks...
But yes, insider trades :(