Gilford Securities has a Hold rating on shares of Arbitron Inc. (NYSE:

). In a note to clients, Gilford writes, "ARB's fundamentals are improving as its Q4A results beat the Street's top-line and bottom-line expectations. Mgmt. also reiterated faster growth and margin expansion in ‘11E, now that the 48 of the Top 50 markets have launched higher-priced PPM service."