Wall Street subdued after Trump's latest attack on Fed

Wall Street's main indexes were flat on Tuesday, pressured by a rise in Treasury bond yields as President Donald Trump's decision to fire a central bank governor renewed concerns about the Federal Reserve's independence, reports Reuters.

Investors also awaited Nvidia's results and a key inflation report later this week for more insight on artificial intelligence and interest rate cuts - the two big themes behind recent market gains. In an unprecedented move, Trump said he was removing Fed Governor Lisa Cook over alleged improprieties in obtaining mortgage loans, prompting investor unease about what it could also mean for the outlook on monetary policy just weeks ahead of the central bank's meeting.

Trump's action is likely to face legal challenges but, if successful, it would let him nominate a new member to the Fed's board at a time when he has called for lower interest rates.