Major U.S. markets were all in the red in midday trading Tuesday following disappointing news out of Europe with a breakdown in talks between Greece and eurozone finance ministers. Weaker-than-expected economic readings at home are also weighing on investors' minds, including the homebuilder sentiment falling for a second straight month. The National Association of Home Builders' index dropped 2 points in February but overall market conditions are still viewed as favorable. Home builder stocks like Toll Brothers (TOL), Lennar (LEN) and KB Home (KBH) are following the current stock market momentum and lower in the session. Looks like some short covering is happening with MGM Resorts International (MGM). The casino operator is gaining better than 1% after initially dropping on a wider than expected Q4 loss. MGM also reported revenue from its VIP table games in China fell 39%.