U.S. stock index futures were lower Tuesday morning, amid the busiest week for earnings.
At around 04:54 a.m. ET, Dow futures fell 40 points, indicating a negative open of more than 23 points. Futures on the S&P and Nasdaq were mixed.
Wall Street ended Monday's session on a strong note after the S&P 500 hit a record high. Strong earnings and news of further progress in trade talks between the U.S. and China helped boosting prices.
S&P's record high extended the second-largest ever bull market to 3,885 days, according to data from Bespoke Investment Group.
Source : CNBC