credit suisse struggles come on the heels of the collapse of silicon valley bank and signature bank in the us those failures caused steep selloffs in regional bank stocks on monday the spdr sp regional bank etf kre fell more than 4 in premarket trading on wednesday zions bancorp and western alliance each fell more than 6 while credit suisses struggles appear unrelated to the midtier us banks the combination of the two issues could spark a broader reexamination of the banking system among investors according to peter boockvar of bleakley financial group what this is telling us is theres the potential for just a large credit extension contraction that banks are going to embark on to focus more on firming up balance sheets and rather than focus on lending boockvar said on cnbcs squawk box its a balance sheet rethink that the markets have also you have to wonder with a lot of these banks if theyre going to have to start going out and raising equity he added in that vein wells fargo on tuesday filed to raise 95 billion of capital through the sale of debt warrants and other securities the bank said the new cash will be used for general corporate purposes the fallout from the collapse of svb could also lead to more regulation and rising costs for the us banking sector including the potential for higher fees to regulators to pay for deposit insurance