For the first time in over a decade, Wall Street is giving more to the Democratic party than the Republican party. For the last ten years, big Wall Street banks and financial houses have leaned towards giving more to Republicans, who had a more favorable policy agenda. However, the pendulum seems to have swung the other way on the back of the kind of disruptions some current Republican policies may bring to bear (e.g. trade war). Bankers themselves are also giving more to Democrats.
FINSUM: Bloomberg framed this giving as an attempt by Wall Street to “soften a blue wave”. That sounds like a fair characterization to us—Wall Street wants to make sure to soften the hard edge of some possible forthcoming democrat policies.