US stock markets closed lower on Thursday after Republicans postponed a vote on President Donald Trump's replacement health care plan, which has been seen as a barometer of support for the president's broader agenda.

The Dow Jones Industrial Average fell 4.72 points or 0.02 percent to settle at 20,656.58. NASDAQ 100 index declined 12.41 points or 0.23 percent to close at 5,355.14. The broader S&P 500 index declined 2.49 points or 0.11 percent to end at 2,345.96.