As of 5:44 p.m. ET in New York on Friday, December 26, 2025, U.S. markets have already wrapped up the regular session, leaving investors to digest a quieter post-holiday tape alongside a steady stream of memory-market headlines.

Sandisk Corporation (NASDAQ: SNDK) was last trading around $250.05 in extended-hours activity, essentially flat versus the prior close—but the day’s action told a more dramatic story: the stock opened near $259.01, hit an intraday high of $261.24, and then slid to finish back around the $250 area, with more than 5.4 million shares changing hands.

That kind of intraday reversal—up sharply early, then fading into the close—is worth noting because it often reflects a market that’s balancing two competing…