Recency Bias

The tendency to over-weight the recent past when judging risk — to focus on uncertainty when bad things have just happened, and to ignore it when “the recent past has been uneventful.” Kyle tags this idea against a line from the Berkshire Hathaway Annual Letters in which Warren Buffett reminds his fellow CEOs that “the immediate future is uncertain; America has faced the unknown since 1776,” and that the swings between worry and complacency track recent experience rather than the actual, constant presence of uncertainty.

In the Berkshire context, recency bias is the investor/operator failure mode Buffett warns against: letting a calm recent stretch lull you into ignoring durable risks (or, inversely, letting a recent shock blind you to long-run resilience). It pairs with Buffett’s broader posture of betting on long-horizon American durability rather than near-term sentiment.

Context: Recency bias is a well-documented cognitive bias in behavioral economics — the disproportionate weighting of recent events relative to older or base-rate information when forming judgments and predictions.

Where this appears

• Berkshire Hathaway Annual Letters — tagged on Buffett’s note that people alternate between fixating on and ignoring uncertainty depending on how uneventful the recent past has been.