Why is Aehr Test Systems (AEHR) stock moving?

I found little company-specific news from the past 14 days, so this view rests mainly on price action. AEHR is in a clear downtrend. It fell from about $71.5 on Oct 14 to $51.47 on Nov 2, a drop of roughly 28%, and it made lower lows near $50.5. Daily swings are very large, often 8-15% from high to low. A bounce from about $53-55 to $64.5 on Oct 27-28 failed at the $64-65 resistance area. The sharp drop on Oct 30 and Nov 2 came with rising volume (48k and 66k shares), which points to active selling. The $50-52 area is the nearest support, and a break below it would be a bearish signal. Resistance sits near $55-57, then $64. With no verified catalyst, the move looks driven by momentum and sector sentiment, so confidence is low.