In January 2008, in the midst of the subprime-mortgage crisis, Warren Buffett is looking for good investment opportunities for his almost $50 billion in cash. As usual, he has been patient and careful in identifying the right opportunities; however, the amount of cash in his company has grown considerably, and with so much cash sitting idle, returns could suffer. This case can be used to pursue several objectives: (1) to showcase Warren Buffett's leadership in the financial markets; (2) to understand his principles and the principles of value investing more broadly; (3) to understand Warren Buffett as both a thinker and a leader in the world of investing and as an agent of stability in a world of capital markets characterized by continuous change; (4) to discuss Buffett's investment decisions (Swiss Re, Burlington Northern, the funding of his own new bond-insurance business, BHAC) and the timing of those decisions in the midst of the subprime crisis and in an environment of increasing energy demand; (5) to discuss his decision not to invest in banks in the current environment as well as his largest investment, the philanthropic Gates Foundation; and (6) to understand some of the new market forces, such as sovereign funds, as providers of capital.