Yeah, it seems extremely likely that some hedge funds and ETFs are going to go bust because of the collapse in oil.
A week ago when production was cut, I imagine there were a lot of people on wall street who took big long positions in oil futures, and they were likely wiped out yesterday.
Oil companies hold a ton of debt, and without a recovery in oil prices, those companies will likely go bust by the end of the year and it could create a type of contagion in the banking industry as the people who get caught holding that debt receive pennies on the dollar.