Groupon (GRPN) shares jumped 38% in recent Thursday trading, a day after the company posted a surprise Q1 GAAP profit.

The company reported earnings late Wednesday of $0.17 per diluted share, swinging from a loss of $0.33 a year earlier.

Three analysts surveyed by FactSet expected a loss of $0.12.

Revenue in the three months ended March 31 fell to $117.2 million from $123.1 million a year earlier.

Four analysts polled by FactSet expected $115.5 million.

The company expects Q2 revenue of $121 to $123 million and affirmed the full-year revenue forecast of $493 million to $500 million.

Four analysts polled by FactSet expect $119.7 million in Q2 and $497 million in the full year.

Price: 23.49, Change: +6.51, Percent Change: +38.31