Our common stock investment in MBIA Inc. (MBI) has also performed well, increasing in value to $11.94 as of December 31, 2013 from $7.85 as of December 31, 2012. There was a big overhang on the stock and that was removed when MBIA Inc. and Bank of America settled their lawsuits. Although MBIA is cheap based on book value, it would make me sleep better if the company receives permission to start writing business again. Investing in companies, where the main operating business is mothballed for a while, makes it harder to evaluate its intrinsic value. Time is not on the side of investors in that type of business.
From Franis Chou's 2013 letter to shareholders.