QQQ-100 Total Short-Interest 
from 7/15/2019 to 6/30/2020

Mar 13 = highest increase in the period (+87 million)
Mar 23 = $SPX below 2200 limit down
Mar 24 = $SPX started V-recovery
Mar 31 = biggest short squeeze  (-141 million)

interesting..🙃 https://t.co/XKebeMglVy