* China raises banks' reserve requirements
* Dell, Marvell rally after results
* Dow up 0.03 pct, S&P up 0.2 pct, Nasdaq up 0.2 pct (Updates to midafternoon, changes byline)
By Leah Schnurr
NEW YORK, Nov 19 (Reuters) - The Nasdaq index rose on Friday as results from Marvell boosted semiconductor shares, but the broad market was on course to end the week flat as stocks pulled back from an autumn rally.
The S&P and Dow were little changed after China's central bank raised bank reserve requirements for the second time in two weeks, stepping up its fight to rein in prices, a move that could temper growth.
Earlier losses eased by the afternoon with light selling across the market and gains in the materials and tech sectors. On the Nasdaq, Marvell Technologies Group Ltd rallied 6.9 percent to $20.24 after its revenue topped profit expectations.
Investors looked ahead to a period of range-bound trading heading into the end of the year after a stellar run. The S&P 500 has fallen about 2.5 percent in the last two weeks but is still up 7 percent this year.
William Delwiche, an investment strategist at Robert W. Baird & Co in Nashville, said sentiment indicators have grown too bullish.
He sees the market in a pullback or trading range "until we get the optimism worked off and some pessimism built up. At that point that could clear the way for the typical year-end rally supported by favorable Fed policy, strong seasonal trends, and strong breadth underlying the market."
The Dow Jones industrial average edged up 3.14 points, or 0.03 percent, at 11,184.37. The Standard & Poor's 500 Index added 1.74 points, or 0.15 percent, to 1,198.43. The Nasdaq Composite Index rose 5.97 points, or 0.24 percent, to 2,520.37.
Concerns about the effects of inflation in China along with debt woes in Europe have pressured equities in recent weeks. Hopes for a resolution to Ireland's debt crisis sparked a big rally on Thursday.
The S&P 500 hovered near 1,200, and analysts said if it fails to break that level convincingly, the index could trade in a tight range for the rest of the year.
The S&P was also just below its 20-day moving average, which is around 1,198. The index first fell below the average earlier in the week.
Frank Cappelleri, technical market analyst and trader in New York, noted this could be a cause for concern. The last time the S&P fell below the average after a prolonged positive trend was in April, which marked a market top at the time.
Marvell helped boost the rest of the semiconductor sector, including SanDisk, which rose 4.1 percent to $40.06. The semiconductor index gained 1.7 percent.
Also on the Nasdaq, Dell Inc rose 2 percent to $13.94 after it raised its profit outlook.
General Motors Co eased 0.4 percent to $34.07 one day after its record-setting initial public offering. Separately, Harrah's Entertainment terminated its own IPO, citing market conditions. (Reporting by Leah Schnurr; Additional reporting by Edward Krudy; Editing by Kenneth Barry)