Wall Street higher on BOJ rate cut, rally in tech shares

The market was also supported by increased expectations that the Federal Reserve would go slow on future rate hikes, after Friday's weak fourth-quarter U.S. GDP data. While the Fed has not ruled out a rate hike in March, the current turmoil and weak data could force it to wait until June. "You've got again a sense that we're back to an easier central bank environment," said Steve Blitz, chief economist at ITG.