Stocks in the news: MBIA, Tyco, Beazer

MBIA (MBI) shares dropped over 13% ahead of the bell after the bond insurer reported Monday heavier losses in its insurance business than expected. The company recorded a massive loss of $727.8 million, or $3.50 a share, which is still slightly better than last year's.

Tyco International (TYC) posted a 53% drop in quarterly net profit to $205 million, or 43 cents per share, as soft economic conditions lowered demand for its construction and control products. Because of lower costs, however, results beat estimates. Revenue fell 16% to $4.4 billion, also above estimates of $4.3 billion.