Sapient shares soared up 18 5/8, or 23 percent, to 98 Thursday after the Internet consulting firm was added to the S&P 500 Index.
Sapient (Nasdaq: SAPE) will replace Reynolds Metals (NYSE: RLM) after the bell.
In its latest quarter, Sapient beat the Street estimate by 2 cents a share, earning $12.7 million, or 19 cents a share, on sales of $100.3 million.
That $100.3 million in sales marked a 74 percent improvement from the first quarter of 1999.
First Call Corp. consensus expects the company to return a profit of 20 cents a share in its second quarter and 83 cents a share in the fiscal year.
Its shares peaked at 151 3/16 in January after falling to a 52-week low of 23 7/8 in July.
All 19 analysts covering the stock maintain either a "buy" or "strong buy" recommendation.
Facebook wants to show good amid scandals: The social network updates its tools for blood donations, nonprofits and mentorships.
Everything Apple announced: What we know about Apple's TV content and service, credit card, game subscription service and more.
Discuss: Sapient added to S&P 500, stock surges
Be respectful, keep it civil and stay on topic. We delete comments that violate our policy, which we encourage you to read. Discussion threads can be closed at any time at our discretion.