US stocks open lower. Dow string of 6 up days in jeopardy.

Dow up 6 straight days. Nasdaq closed at all time highs yesterday.  S&P closed higher on the year yesterday.
A day after the Dow extended it's win streak to 6 straight days (longest winning streak in 9 months), the S&P erased the 2020 declines and close higher, and the NASDAQ index close at an all-time record high, the