(Reuters) - U.S. stocks closed lower on Friday, ending a volatile week with their worst five-day start to a year ever, as sliding oil prices and lingering worries about the global economy offset upbeat U.S. job growth.

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Both the Dow and S&P 500 had their worst five-day starts in history, with the Dow falling 6.2 percent for the week and S&P 500 sliding 6 percent. The Nasdaq was down 7.3 percent this week.

All three indexes saw losses accelerating into the close.

The market had opened higher after data showing U.S. nonfarm payrolls surged in December and the unemployment rate held steady. But that was not enough to keep stocks in positive territory.

Oil prices fell for a fifth day and Brent lost 10 percent for the week, while the S&P energy sector .SPNY also extended this week's slide, ending the day down 1.3 percent.

Fears of a slowdown in China and the global economy spooked investors this week, creating a turbulent start to the trading year.

“The start of the year is very poor, so that’s got investors on the defensive,” said Bucky Hellwig, senior vice president at BB&T Wealth Management in Birmingham, Alabama.

“In the face of weakening global growth ... it’s difficult to find reasons to commit money at this point even if one is bullish,” he said, adding that he expects stocks to rebound from these oversold conditions next week.

The Dow Jones industrial average .DJI was down 167.65 points, or 1.02 percent, to 16,346.45, the S&P 500 .SPX lost 21.06 points, or 1.08 percent, to 1,922.03 and the Nasdaq Composite .IXIC dropped 45.80 points, or 0.98 percent, to 4,643.63.

The CBOE Volatility Index .VIX ended up 8.1 percent Friday at 27.01, its highest close since Sept. 28.

All 10 S&P 500 sectors ended with declines.

Gap GPS.N sank 14.3 percent to $22.91 after the apparel retailer reported a larger-than-expected drop in December same-store sales, while Container Store TCS.N slumped 41.2 percent to $4.22, a day after storage products retailer's fourth-quarter profit forecast missed estimates.

Apple AAPL.O shares, however, snapped their three-day losing streak and were up 0.5 percent at $96.96.

Volume was again heavy. About 8.9 billion shares changed hands on U.S. exchanges, well above the 7.3 billion daily average for the past 20 trading days, according to Thomson Reuters data.

NYSE declining issues outnumbered advancing ones 2,092 to 980, for a 2.13-to-1 ratio on the downside; on the Nasdaq, 2,018 issues fell and 812 advanced for a 2.49-to-1 ratio favoring decliners.

The S&P 500 posted one new 52-week high and 93 new lows; the Nasdaq recorded 13 new highs and 312 new lows.