By Chuck Mikolajczak
(Reuters) - U.S. stocks advanced modestly on Tuesday as higher oil prices lifted the energy sector, but another slump in Facebook Inc
Oil prices rose more than 2 percent to touch a three-week high, driven by tensions in the Middle East and the possibility of further declines in Venezuelan crude output.
Those gains helped the S&P energy index <.SPNY> rise 0.84 percent, making it easily the best performing of the 11 major S&P 500 sectors.
Facebook Inc
The stock has fallen about 9 percent over the past two sessions, its biggest two-day decline since February 2016, a drop that has weighed heavily on equities.
U.S. and European lawmakers have demanded an explanation of how the consultancy, Cambridge Analytica, gained access to the data and why Facebook failed to inform its users, raising broader industry questions about consumer privacy and whether tougher regulation is on the horizon.
"The negative part would be they are going to haul them in front of Congress now and we'll see do they create new laws, are there new regulations that could stunt the growth of the company? That is really what the fear is," said Joe Saluzzi, co-manager of trading at Themis Trading in Chatham, New Jersey.
Facebook was not the only social media stock or fund taking a hit on Tuesday. Shares of Snap Inc
The Dow Jones Industrial Average <.DJI> rose 116.36 points, or 0.47 percent, to 24,727.27, the S&P 500 <.SPX> gained 4.02 points, or 0.15 percent, to 2,716.94 and the Nasdaq Composite <.IXIC> added 20.06 points, or 0.27 percent, to 7,364.30.
Oracle
Financial stocks <.SPSY> edged up 0.21 percent as investors awaited a near-certain interest rate hike at the end of the Federal Reserve's two-day meeting on Wednesday.
Market participants largely expect a total of three rate hikes this year, although some have not ruled out the possibility the U.S. central bank will hike four times.
"We are finally normalizing, after years we talked about the Fed holding it down and the market only going up because of the Fed. Now let's see what the market can do - can it stand on its own two legs?" said Saluzzi, referring to the low interest rate environment the Fed put into effect after the financial crisis.
Volume on U.S. exchanges was 6.26 billion shares, compared with the 7.17 billion average for the full session over the last 20 trading days.
Declining issues outnumbered advancing ones on the NYSE by a 1.28-to-1 ratio; on Nasdaq, a 1.26-to-1 ratio favored decliners.
(Reporting by Chuck Mikolajczak; Editing by Jonathan Oatis)
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