Shares of Huntington Beach-based Quiksilver Inc. were up about 8% in midday trading Monday.

The action sports apparel maker and retailer received an upgrade from Stifel Nicolaus from “hold” to “buy” on an improving European business.

The company had a recent market value of $604 million.

Quiksilver sells clothes, shoes and accessories under its namesake brand, in addition to Roxy and DC Shoes among other brands. It also operates more than 500 stores.