Robertson Stephens has raised its rating on Men's Wearhouse Inc to "buy" from "market perform", despite the men#;s clothing retailer saying it expects February same-store sales to plunge around 10 per cent.

Analyst Lauren Cooks Levitan said in a research note on Friday that despite the expected fall, that figure is ahead of previous expectations and an improvement from the fourth quarter's 14.4 per cent slide.

"While we acknowledge that a continued difficult macroeconomic scenario is likely to result in continued volatility in the business, we believe the company's shifts in promotional and pricing strategy and store commission structure are starting to pay off," she said.

Levitan added if the clothing retailer#;s recent sales momentum continues, the 15 cents per share first-quarter earnings per share estimate "could prove highly conservative".