WASHINGTON, DC (AP) - Federal Reserve Chairman Ben Bernanke signaled on Wednesday that a two-year campaign of raising interest rates may finally be coming to an end, triggering a huge rally on Wall Street.

Bernanke told Congress he believed the economy was slowing to a more sustainable pace and the slowdown would help to lower inflation pressures. The Fed has gradually pushed interest rates to a five-year high in an effort to keep inflation under control.