May 10 (Bloomberg) — Ben S. Bernanke's $600 billion strike against deflation is paying off, as stock and debt markets rise, bank lending grows and economists forecast faster growth.

The Standard & Poor's 500 Index has gained 13.5 percent since the Federal Reserve chairman announced on Nov. 3 the plan to buy Treasuries through its so-called quantitative easing policy. Government bond yields show investors expect consumer prices to rise in line with historical averages. The riskiest companies are obtaining credit at the cheapest borrowing costs ever and Fed data show that commercial and industrial loans outstanding are rising for the first time since 2008.

“Looking at market indicators, you have to be convinced it's been a success,” said Bradley Tank, chief investment officer for fixed-income in Chicago at Neuberger Berman Fixed Income LLC, which oversees about $83 billion. “When you get into periods of aggressive central bank easing, and we're clearly in the most aggressive period of easing that we've ever seen, the markets tend to lead the real economy.”