Ross Stores, Inc. (NASDAQ:ROST) shares are trading higher Thursday after the company reported better-than-expected second-quarter results and raised its fiscal year earnings guidance with its midpoint above estimates. Here’s a look at the details from the report. The Details: Ross Stores reported quarterly GAAP earnings of $1.59 per share which beat the analyst consensus estimate and represents a 20.45% from the same period last year. Quarterly revenue came in at $5.29 billion which also beat the consensus estimate and is a 7.13% increase year-over-year with comparable store sales up 4% versus…