(Reuters) - Wall Street's three main indexes hit record intraday highs on Thursday after President Donald Trump said he would make a "phenomenal" tax announcement over the next two or three weeks.

A post-election rally has sent Wall Street's indexes to record highs on bets that Trump would usher in an era of tax cuts, simpler regulations and higher infrastructure spending.

"Lowering the overall tax burden on American business is big league," Trump said in a meeting with airline executives.

Chris Gaffney, president of world markets at EverBank, said this was another 'Trump On' trade day.

"We're finally seeing some of the proposed policies being put into place."