Warren Buffett poured $3 billion into Dow Chemical during the financial crisis. Here's the story of how he helped the manufacturing titan – and doubled his money.

Warren Buffett invested $3 billion in Dow Chemical at the height of the financial crisis.

In return, Berkshire Hathaway received preferred stock paying a yearly dividend of 8.5% .

Dow agreed to buy Rohm and Haas for nearly $19 billion including debt in July 2008 .

Dow 's takeover proved to be poorly timed as the Lehman Brothers collapsed two months later .

Dow 's then-CEO, Andrew Liveris , tipped his hat to Buffett . "He's done very well with that investment, as he has done at Goldman and elsewhere," he told Reuters . "He was incredibly valuable through the crisis." Read the original article on Business Insider .