Investors also showed a reluctance to make aggressive bets ahead of Tuesday's release of US payrolls data for September, which was delayed by the recent government shutdown.
"You could be seeing some profit-taking" after last week's highs, said Uri Landesman, president of Platinum Partners, which manages more than $1 billion in assets in New York. "You could also see some profit-taking off a weak jobs number tomorrow or in advance of the number today."
Netflix
The Dow was lower after McDonald's Corp
Advancers and decliners were about evenly split on the New York Stock exchange declined.
Though only a small percentage of S&P 500 stocks have reported earnings thus far, the season has been mixed, with revenue growth especially a concern. Still, profits have largely risen and many bellwether companies have topped expectations.
With 21% of S&P companies having reported, 61.5% have topped profit expectations, a rate slightly above the historical average. But only 52% have topped expectations on revenue, below the historical average of 61%.
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"The push for healthcare is going to be greater as more people age and come online. We just don't know how it's going to affect the bottom line," said Thomas Nyheim, vice president and portfolio manager at Christiana Trust in Greenville, Delaware.
The Dow Jones industrial average was down 7.64 points, or 0.05%, at 15,392.01. The Standard & Poor's 500 Index was up 0.14 points, or 0.01%, at 1,744.64. The Nasdaq Composite Index was up 5.77 points, or 0.15%, at 3,920.05.
The S&P 500 on Friday capped its biggest weekly gain in three months on stronger-than-expected earnings from Google
S&P sectors were mixed, with healthcare stocks making the biggest decline, down 0.6%. Nyheim, who manages investments in healthcare stocks, said the sector will be unpredictable until the effects of President Obama's health care law play out.
McDonald's fell 0.6% to $94.59 after it reported revenue that missed estimates and warned global October sales could be relatively flat.
Apple boosted the S&P 500 and Nasdaq after Societe Generale lifted its price target on the stock to $575 from $500 and advised clients to buy shares. The stock rose 2.4% to $521.30 and was the largest winner on the Nasdaq, adding 7.5 points to the index.
More than 25% of the S&P 500 components are due to report this week.
Hasbro Inc
Solar power companies were among the strongest on Monday, with First Solar Inc
JPMorgan Chase & Co