* Goldman, Citigroup earnings push financial stocks lower
* United Health, CSX drop on results, Best Buy plummets
* Initial jobless claims dip; CPI up in December vs November
* Dow down 0.5 pct, S&P 500 off 0.2 pct, Nasdaq off 0.02 pct
NEW YORK, Jan 16 (Reuters) - U.S. stocks fell on Thursday, with the S&P 500 pulling back from record levels following a round of disappointing earnings as financial stocks led the way lower.
Financials were the biggest drag on the market after both Citigroup Inc and Goldman Sachs Group Inc reported quarterly profits hit by lower bond trading revenue, with Goldman's earnings falling 21 percent and Citigroup's missing expectations. The results followed fairly positive reads on the sector from JPMorgan Chase & Co, Bank of America Corp and Wells Fargo & Co.
Goldman's stock slid 2.2 percent to $174.79 and ranked as one of the Dow's biggest decliners, while Citigroup dropped 4.1 percent to $52.74. The S&P financial sector index fell 0.7 percent, making it the biggest loser among the S&P 500 sectors.
"This group is very tied to the economy, and it makes it difficult to argue that we could see a higher GDP ahead, given these," said Paul Nolte, managing director at Dearborn Partners in Chicago. "The earnings picture, along with some recent data, suggests we haven't made it out of the very slow growth rate that we've been seeing."
UnitedHealth Group Inc was the Dow's biggest decliner, falling 3.2 percent to $72.47 even as the largest U.S. health insurer reported a higher fourth-quarter profit and said 2014 earnings would improve.
CSX Corp shares also sank, dropping 7.4 percent to $27.07 a day after the major U.S. railroad reported profits that missed expectations.
The Dow Jones industrial average was down 78.16 points, or 0.47 percent, at 16,403.78. The Standard & Poor's 500 Index was down 4.45 points, or 0.24 percent, at 1,843.93. The Nasdaq Composite Index was down 0.64 of a point, or 0.02 percent, at 4,214.25.
After a lackluster start to 2014 on concerns that stock valuations may be too high after the S&P 500's rally of 30 percent last year, the index surged 1.6 percent over the past two sessions to close at a record high on Wednesday, its first since Dec. 31.
"Stocks are a little more expensive at these levels, but I don't think we're overly due for a correction," said Oliver Pursche, president of Gary Goldberg Financial Services in Suffern, New York. "If we saw a pullback of even 10 percent, I would view that as a buying opportunity."
The stock of Best Buy Co Inc plunged 27.6 percent to $27.19, easily the S&P 500's worst performer after the world's largest consumer electronics chain reported a drop in holiday sales and forecast a bigger-than-expected decline in quarterly operating margins.
In the latest economic data, the Consumer Price Index rose 0.3 percent in December while the core CPI, which strips out volatile food and energy prices, edged up only 0.1 percent, suggesting underlying inflation was muted.
Initial claims for state unemployment benefits slipped 2,000 to a seasonally adjusted 326,000 in the week ended Jan. 11. Claims for the prior week were revised to show 2,000 fewer applications received than previously reported, suggesting a sharp slowdown in job growth in December was likely to be temporary.
The Philadelphia Federal Reserve Bank said its business activity index stood at 9.4 points in January, compared with 6.4 in December. This month's reading exceeded the median forecast of 8.6 among economists polled by Reuters. But companies' outlook for the months ahead worsened.
In the deal arena, Apollo Global Management LLC said it would buy CEC Entertainment Inc, the parent of the Chuck E Cheese restaurant chain, for about $948 million. CEC Entertainment's stock jumped 12.6 percent to $54.52. In contrast, Apollo Global's shares declined 1.1 percent to $35.37.