George Soros, in the Financial Times, looks at what caused the economic crisis to really intensify and blames the decision by the government to let Lehman Brothers fail on September 15:

On Monday September 15, Lehman Brothers, the US investment bank, was allowed to go into bankruptcy without proper preparation. It was a game-changing event with catastrophic consequences.

For a start, the price of credit default swaps, a form of insurance against companies defaulting on debt, went through the roof as investors took cover. AIG, the insurance giant, was carrying a large short position in CDS and faced imminent default. By the next day Hank Paulson, then US Treasury secretary, had to reverse himself and come to the rescue of AIG.

But worse was to come. Lehman was one of the main market-makers in commercial paper and a large issuer of these short-term obligations to boot. Reserve Primary, an independent money market fund, held Lehman paper and, since it had no deep pocket to turn to, it had to “break the buck” – stop redeeming its shares at par. That caused panic among depositors: by Thursday a run on money market funds was in full swing.

The panic then spread to the stock market. The financial system suffered cardiac arrest and had to be put on artificial life support.

I tend to agree with him on this issue. It was an inexcusable lapse, which set off more costly failures, most notably that of AIG, which has cost the government countless billions more than they would have ever had to spend to save Lehman. Read the whole thing.