U.S. stock futures were heading higher early Monday, building on the record highs reached last week. Dow Jones Industrial Average futures added 50 points, or 0.1%. S&P 500 futures were gaining 0.2% and Nasdaq 100 futures increased 0.

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The post-election rally in stocks pushed all three major U.S. indexes to closing highs Wednesday. The Dow Jones Industrial Average, Nasdaq Composite and S&P 500 all finished the day with records. It was the first time since May 15 that all three indexes closed at a record on the same day,

The blue-chip Dow closed up 259.65 points, or 0.59%, to a record high 43,988.99, and the broad Standard & Poor's 500 index finished up 22.44 points, or 0.38%, to an all-time high of 5,995.54. The S&P 500 and Dow are both about 4.

Stock investors absorbed a sharp midweek, postelection spike in Treasury yields and sent equities to record highs on Friday. Now the question is whether they can endure a further climb in market-based rates in the months and years ahead after incoming President Donald Trump takes office.

U.S. stock index futures rose on Monday, extending post-election gains, while investors awaited the next batch of economic data that could decide whether the equity rally can sustain itself. Several stocks that rose following the U.