The Dow Jones Industrial Average fell 45.74 points, or 0.22 percent, to 20,550.98, the S&P 500 lost 2.39 points, or 0.10 percent, to 2,341.59 and the Nasdaq Composite added 11.64 points, or 0.2 percent, to 5,840.37.
The Dow's eighth straight decline marked its longest such streak in nearly six years.
The benchmark S&P 500 had fallen as much as 0.9 percent initially on Monday and briefly dropped below its 50-day moving average for the first time since just after the November 8 US presidential election.
The S&P 500 has climbed 9.4 percent since Trump's election, but the rally has stalled recently.
The S&P 500 posted 11 new 52-week highs and 7 new lows; the Nasdaq Composite recorded 62 new highs and 54 new lows.
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