NEW YORK (CNN/Money) - AT&T Wireless stock rose sharply Tuesday after the mobile services provider boosted revenue and subscribers. But the company said its loss in the first quarter widened, hurt by a large accounting adjustment.

Shares of Pulte Homes also jumped after the nation's largest homebuilder posted higher quarterly earnings, as low mortgage rates fueled demand for new homes and the company increased market share.

But two major investment banks lowered their ratings of SeeBeyond Technology after the integration software company reported a revenue decline.

Pulte Homes (PHM: up $2.29 to $54.35, Research, Estimates). The homebuilder posted a better-than-expected quarterly operating profit, benefiting from higher selling prices and higher demand for homes due to low interest rates.

AT&T Wireless (AWE: up $0.84 to $8.94, Research, Estimates). The mobile phone service provider reported a narrower-than-expected first-quarter loss that improved upon results from the same period one year earlier.

International Game Technology (IGT: up $4.70 to $58.87, Research, Estimates). The No. 1 slot machine maker reported a fiscal second-quarter profit of 80 cents per share, a penny better than estimates and 10 cents better than earnings one year earlier.

Avaya (AV: up $0.82 to $6.42, Research, Estimates). Merrill Lynch upgraded the telecom systems developer, formerly a Lucent unit, to "buy" from "neutral" after it reported a second-quarter loss of 5 cents per share. That was 3 cents narrower than expected, but the reverse of a profit in the year-earlier period. The company also said it expects to see modest improvements in the third quarter.

Pre-Paid Legal Services (PPD: up $3.90 to $29.30, Research, Estimates). The seller of pre-paid legal services for a monthly fee reported a first-quarter profit of 43 cents, up from 35 cents a year earlier, thanks to the addition of 200,000 new members.

Biosite (BSTE: up $7.21 to $30.20, Research, Estimates). Banc of America Securities upgraded the maker of medical tests that can be used to identify such problems as drug use or congenital heart failure after it reported earnings per share in the first quarter of 16 cents, 4 cents better than expected, and raised its 2002 targets.

Coach (COH: up $2.75 to $56.60, Research, Estimates). The maker of leather accessories reported stronger fiscal third-quarter net income of 32 cents per share, beating the First Call analysts' consensus of 28 cents per share. Looking forward, the company expects earnings per share in the fourth quarter of 32 cents, 2 cents better than estimates, and sees earnings for the following fiscal year of $2.20 a share, 4 cents above the consensus.

Calpine (CPN: up $1.42 to $13.33, Research, Estimates). The energy producer said it has restructured its long-term power contracts with the California Department of Water Resources, agreeing to lower some prices and shorten certain contracts, in a deal that should make electricity availability more flexible when needed. As a result, a California regulatory board will withdraw complaints against the company and no longer seek refunds.

SeeBeyond Technology (SBYN: Research, Estimates). Merrill Lynch led the list of brokerages that downgraded the provider of e-business software after it warned that second-quarter and 2002 earnings will miss expectations. The company also reported first-quarter net income of 3 cents per share, in line with estimates, versus a loss of 2 cents a share in the year-earlier period.

DuPont (DD: down $1.51 to $44.84, Research, Estimates). The chemical titan reported a lower operating profit amid soft industrial demand.

ExxonMobil (XOM: down $0.50 to $41.35, Research, Estimates). The world's largest publicly traded oil company posted earnings, excluding one-time items, that were less than expected amid a weak refining business and lower crude and natural gas prices.

WorldCom (WCOM: down $0.60 to $3.41, Research, Estimates). The company stock continued its decline as a loss in its Brazilian unit and a ratings cut added to earlier concerns over a profit warning.

Lincoln National (LNC: down $2.31 to $49.10, Research, Estimates). The life insurer reported a sharply lower first-quarter profit that missed estimates due to investment losses and lower earnings from its annuities unit. The company said that 2002 operating earnings will come in between $3.70 and $4 per share; analysts are looking for earnings of $3.96 per share, which is more than the midpoint of the projected range.

Overland Data (OVRL: down $3.17 to $8.15, Research, Estimates). The data storage firm warned that fourth-quarter net profit would be between 5 cents and 7 cents per share, sharply below the current estimate of 20 cents per share. The company also reported third-quarter earnings of 18 cents a share, ahead of estimates and its earnings in the year-earlier period.

CACI International (CACI: down $8.49 to $32.00, Research, Estimates). The provider of information technology services warned that while fiscal fourth-quarter revenue should top estimates, earnings per share will come in lower than expected. The company also reported third-quarter earnings per share of 33 cents, in line with forecasts.

Lattice Semiconductor (LSCC: down $4.26 to $12.20, Research, Estimates). Merrill Lynch downgraded the maker of customizable computer chips to "near-term neutral" from "near-term buy," a day after the company reported a first-quarter profit in line with Wall Street estimates but revenue tumbled 47 percent from the year-earlier quarter.

EarthLink (ELNK: down $1.58 to $7.95, Research, Estimates). CIBC World Markets downgraded the Internet service provider to "buy" from "strong buy" and lowered its price target on the stock to $13 from $20, saying the company continues to face pricing pressure in a competitive broadband market. EarthLink reported a first-quarter loss Monday that narrowed from the year-earlier quarter but still came in 2 cents wider than Wall Street's estimates. The company also warned about its second quarter, saying its projected loss of 8-to-10 cents a share would be wider than analysts' forecasts of a 6 cent loss.

Ericsson (ERICY: down $0.25 to $2.49, Research, Estimates). The pain continues for the Swedish cell phone maker, which reported a first-quarter loss Monday and said it will not be profitable this year. The brokerage firm Commerzbank on Tuesday cut its price target for the European shares of the company.  

-- from staff and wire reports