Wall Street rebounds, Dow Jones surges 336 points

NEW YORK, New York - Bank shares sustained more damage on U.S. stock markets Tuesday but the selling somewhat abated. Moody's, however, put a dampener on markets by downgrading the banking sector to negative.

"We have changed to negative from stable our outlook on the U.S. banking system to reflect the rapid deterioration in the operating environment following deposit runs at Silicon Valley Bank (SVB), Silvergate