Shares of casino companies traded lower with the broader market Tuesday, and Monday's big gainer, MGM Mirage ( MGM), was downgraded by Janney Montgomery Scott. The downgrade was from neutral to sell. Also, a report from the Nevada Gaming Control Board said that Nevada casinos recorded $830.9 million in revenue in February, an 18.1% decline from a year earlier. It also was the 14th consecutive month that Nevada gaming revenue declined. The GCB report said that Las Vegas Strip gaming revenue was down 23.5% in February, while resorts on Lake Tahoe's south shore decreased 26.8%. Casino revenues have been pounded by the economic downturn as consumers retrench. Atlantic City's casinos had their biggest revenue drop in 30 years -- 19.2% -- in February, according to the New Jersey Casino Control Commission. MGM Mirage, which rose 19% Monday on news that it was selling two properties to raise cash, gave it all back, closing down 19.5%, or $1.08 to $4.45. Las Vegas Sands ( LVS) was off $1 to $3.91, or more than 20% on volume of more than 72 million shares -- twice its average daily volume. Boyd Gaming ( BYD) was down 12% to $4.95. Melco Crown Entertainment ( MPEL) was lower by 8% to $4.15. Wynn Resorts ( WYNN) was down 13.5.% to $26.98. Penn National Gaming ( PENN) was lower 2.6% to $25.72.