The Dow Jones industrial average was up 11 points at 13,198 as of noon Eastern, giving up an earlier gain of 44 points. The Standard & Poor's 500 index was off a point at 1,394, and the Nasdaq composite was down two at 3,037.
If the Dow's gains hold, the Dow will have risen six days straight, its longest winning streak since February 2011. The Dow is up 8 percent for the year. Other indexes are up even more: The S&P is up 11 percent, the Nasdaq 17 percent.
Other market indicators were mixed Wednesday. Only three of the 10 industry groups in the S&P 500 rose, and falling stocks outnumbered rising ones more than 2-to-1 on the New York Stock Exchange. The Russell 2000 index of small-company stocks fell 0.8 percent.
On Tuesday, a powerful rally in bank stocks pushed the Dow to its highest close since the last day of 2007. The Federal Reserve said 15 of the 19 major banks it surveyed passed a so-called stress test to see how they would stand up in a financial crisis worse than what happened in 2008.
Citigroup, among the four that weren't deemed strong enough to raise their dividends or make other distributions to shareholders, fell 4 percent in morning trading. Other banks that passed the Fed's test mostly rose.
MetLife, an insurance company, also failed to pass the Fed's stress test. The stock slid 5 percent in early trading, the most in the S&P 500.
Gold fell $44 to $1,650 an ounce. The dollar rose against the euro and the yen and European markets were higher. Germany's DAX rose 1.2 percent and the benchmark indexes in Spain and France each rose 0.6 percent.
The Fed was planning to wait until Thursday to release the results of its stress tests, which determine which financial companies are healthy enough to raise their dividends. After JPMorgan Chase surprised the market with an announcement Tuesday that it would raise its dividend and buy back stock, the Fed released the results early.
The yield on the 10-year Treasury note rose sharply, to 2.23 percent from 2.11 percent late Wednesday. The benchmark yield has risen for five days straight and is at the highest level since October. That's a sign that investors believe the economy is improving and that they're more willing to hold higher-risk assets like stocks and commodities.
Apple rose for a sixth straight day, gaining $14, or 2.4 percent, the $581.93. The stock started the year at $405. The company announced the latest version of its blockbuster tablet computer, the iPad, last week.
Southwest Airlines fell 4.3 percent a day after the low-cost carrier said it didn't expect to earn a profit in the first quarter because of higher fuel costs. The airline also said ticket bookings for spring travel weakened in late February.
Cliffs Natural Resources jumped 6 percent. The Cleveland-based mining company said late Tuesday it was bumping its dividend to 62.6 cents, from 28 cents.