NEW YORK (TheStreet) -- Monetary policy has produced many bubbles in the U.S. capital markets during the Greenspan and Bernanke years at the Federal Reserve.The gold bubble began to inflate in 2002 and popped with an all-time high at $1923.7 an ounce in September 2011. Gold had been above its 200-week simple moving average since 2002 and has been below it since this past April. The crude oil bubble inflated to a high of $144.27 per barrel in July 2008 then popped to a low of $33.20 in January 2009. Oil has been trading back and forth around its 200-week SMA at 91.09 since mid-2009. In the U.S. equity markets the Nasdaq is attempting to re-inflate the bubble of the year 2000 with the current levels well within the 'dunce cap' that typically forms after a bubble pops. Today I profile 11 sector ETFs that show bubble characteristics with eight showing potential peaks in the Sept. 19/Sept. 20 window.