It was the strongest performer on the Standard Poor's 500-stock index on Tuesday, and has gained 95% this year.

WSJ: Dow Reaches 4-Year High

The Standard Poor's 500-stock index gained 7.32 points, or 0.6%, to 1285.50 Tuesday.

WSJ: U.S. Stocks Rise on Service-Sector Data

The Standard and Poor's 500 fell two points to 1, 500, trimming its advance for the month to 5.2 percent.

NPR: Stocks Drift Lower, Paring January Gains

The Dow Jones industrial average crossed 15, 000 for the first time early Friday, and the Standard and Poor's 500 index, a broader market measure, broke through 1, 600 for the first time.

NPR: Stocks Surge To New Highs After Hiring Climbs