The data shows that the hall of fame inductions did not produce significant price increases for these three player’s cards. However, the typical explanation for this behavior is that there’s a flood of supply, with sellers knowing that the Hall of Fame or any other significant career moment might be a good time to capture the most value.
While we are mostly seeing 2-3% of the total population of cards listed, the absolute numbers are fairly high and it does appear that a flood of supply has entered the market from sellers hoping to capitalize on the announcement.
On top of the influx of supply, it’s likely that the average 46% price drop across these cards since February / March may have buyers a bit more cautious during this cycle of the market. It’s possible that the Hall of Fame anticipation started much earlier and as a result, these cards hit record prices months prior to the actual event taking place.
Post Hall of Fame induction, there’s plenty of copies to go around with many recent listings. We saw the same thing happen in football, with a flood of supply hitting the market after a Superbowl win, and it drove prices down. This is likely the same behavior - it might be a time for a buyer to take advantage of the available supply!