March 15 (Reuters) - European bank stocks fell sharply on Wednesday, with embattled Credit Suisse (CSGN.S) tumbling to a new low, on renewed investor concerns about stresses within the sector triggered by Silicon Valley Bank's sudden collapse. A more than 20% drop in Credit Suisse shares led a 6% plus fall in the European banking index (.SX7P), while five-year credit default swaps (CDS) for the flagship Swiss bank hit a new record high, highlighting increasing investor concerns. We move from the problems of American banks to those of European banks, first of all Credit Suisse," said Carlo Franchini, head of institutional clients at Banca Ifigest in Milan. BlackRock (BLK.N) Chief Executive Laurence Fink warned on Wednesday that the U.S. regional banking sector remains at risk, and predicted further high inflation and rate increases. And in an attempt to avert a similar crisis down the line, the U.S. Federal Reserve is considering tougher rules and oversight for midsize banks similar in size to SVB.

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