People working in the U.S. securities and investment industry gave $20 million to Romney's campaign, versus $6 million to Obama, according to the Center for Responsive Politics. Four years ago, Obama received $16 million and Republican nominee John McCain only attracted $9 million.
Obama's administration has still not finished writing many of the most important rules called for in the Dodd Frank law, passed after the U.S. financial system nearly collapsed in 2008, forcing taxpayers to pour hundreds of billions of dollars into banks' coffers.
Many Americans believe the financial crisis was caused by banks' terrible judgment in areas like mortgage lending and securitization. Public support is strong for laws designed to make the financial system safer, even if bank profits suffer.
A 2010 Gallup poll showed that Dodd-Frank was Obama's most popular law, exceeding healthcare reform, for example. Few Washington lobbyists thought that Romney could fully repeal Dodd-Frank, because public support for the law is too high.
RELATIONS WITH REGULATORS
Banks must now focus on softening regulations to the extent they can. Among the financial industry's top complaints are the Volcker rule, which prevents banks from making big bets in financial markets with their own money, and the Durbin Amendment, which limits the fees they can charge merchants for processing debit-card transactions.
Banks also want to scale back capital requirements, which cut into the returns banks can earn on their equity capital.
The industry had hoped to weaken the Consumer Financial Protection Bureau through steps like changing its structure to be headed by Democrat and Republican commissioners, but these steps are unlikely to gain much traction, analysts said.
"What I was told last night by Obama's win is, there will be no change to the CFPB in 2013," said Isaac Boltansky, a policy analyst at Compass Point Research & Trading in Washington.
Some banking industry lobbyists say their focus will be on the key regulators Obama is expected to name in his second term.
Major power players under Obama, including Treasury Secretary Timothy Geithner, are expected to step down, offering Wall Street a chance to reset relations.
Chairmen determine agendas at agencies such as the SEC and Commodity Futures Trading Commission (CFTC), so Obama's choices to fill any open spots could affect how quickly new rules are implemented.
"If there was a different chair who had a different agenda, you could slow things down," said Bart Chilton, a Democratic commissioner at the Commodity Futures Trading Commission.