请问高手？net short position reduced by $19b this week

请问高手下面这个消息有什么意义和影响？
Just a quick note on the just-released Commitments of Traders report. Large commercial hedges in the major equity index futures (S&P500, Nasdaq 100 and DJIA), both full contract and e-mini went from a large $33 billion net short position to a $14 billlion net short.
That nearly $20 billion weekly swing is the largest in history, nearly double the previous record reduction in net shorts.