The @WSJ on what's driving the 
shorting of #stocks that has seen "bets against the SPDR S&amp;P 500 Trust, the biggest exchange-traded fund tracking the broad index, [rise] to $68.1 billion last week, the highest level in data going back to January 2016."
 
https://t.co/euzStmpfwb https://t.co/KHlEx9s3E5