How likely is it that banks made a bunch of 2007-tier bad investments with fracking companies instead of subprime mortgages?
by the way you worded this question, i can tell that you don't actually fully understand how the subprime crisis happened
even if undeniable proof that fracking causes abortions and testicular cancer were published tomorrow, and every fracking firm and subsidiary on the planet immediately filed for liquidation, it still wouldn't cause a bank run on the scale of which was seen in 2008.
>not using credibly alternative sources
>all "viewpoints" are pf equal weight or validity