The U.S. stock market is fluctuating between small gains and losses as investors keep a close eye on tensions in Ukraine.
The Ukrainian region of Crimea is holding a vote over the weekend over whether to secede. The U.S. and Europe have warned Russia of consequences if it moves to seize the region.
The Standard & Poor's 500 index rose four points, or 0.2 percent, to 1,850 as of noon. Utilities rose the most as investors sought out low-risk stocks.
The Dow Jones industrial average fell 36 points, or 0.2 percent, to 16,145. The Nasdaq composite rose eight points, or 0.2 percent, to 4,269.
Liberty Media rose 8 percent after saying it would drop its bid to buy the rest of the satellite radio provider Sirius XM.