The Dow Jones industrial average began the week at 15,543.74 points and closed Friday at 15,558.83, down 3.22 points or 0.02 percent on the day.
The Standard & Poor's index went the other way, starting the week at 1,692.09, but closing fractionally lower at 1,691.65, gaining 1.4 points or 0.08 percent on Friday.
The Nasdaq index added 7.98 points Friday or 0.22 percent to 3,613.16, five days after opening the week at 3,587.61.
On Friday, winners included Intel, up 0.87 percent and Travelers, up 0.91 percent.
But the Dow was split evenly, 15 up and 15 down. Planemaker Boeing dropped 1.03 percent. Hewlett-Packard slipped 0.95 percent.
On the New York Stock Exchange, 1,456 issues advanced, while 1,594 declined on volume of 2.7 billion shares traded.
The 10-year treasury note rose 2/32 to yield 2.567 percent.
Japan's Nikkei index shed 2.97 percent or 432.95 points to 14,129.98.
In Britain, the FTSE 100 index dropped 0.5 percent or 33.16 points to 6,554.79.
In after-hours trading on the New York Mercantile Exchange, crude oil was down 80 cents or 0.76 percent to $104.69 a barrel.
Gold added $4 or 0.3 percent to close at $1,333.50 per troy ounce on the NYMEX Comex division while silver shed 15.4 cents to close at $20.
On currency markets, the euro was unchanged at $1.3278. Against the yen, the dollar fell to 98.24 yen from Thursday's 99.33 yen.
On the Chicago Board of Trade, December corn was off 3 3/4 to $4.75 1/4, November soybeans were up 5 to $12.29 and September wheat was unchanged at $6.49 1/4.
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