Top bank regulators faced tough questions from lawmakers on the second day of hearings regarding the sudden collapse of Silicon Valley Bank and Signature Bank. Rep. Maxine Waters, the ranking member of the committee, expressed doubts about whether the warnings regulators gave SVB regarding its balance sheet and long-term interest risks were adequate. House Financial Services Chairman Rep. Patrick McHenry, R-N.C., accused the panel of not being transparent about the weekend when the three regulators hastily arranged backup financing to prevent depositors from losing their funds in the collapse of the two banks. Bank stocks tumbled after the first round of hearings on Tuesday when the three top regulators said they favored more restrictions for banks with more than $100 billion in assets.