Author and Wharton professor Jeremy Siegel says the Federal Reserve’s quantitative easing policies are working, despite recent increases in Treasury bond yields. Siegel tells Bloomberg that Treasury rates have been rising because of increased confidence in the economy and a decrease in risk aversion, which are positives. He also says that the Fed will have to reverse course and start raising rates sooner than expected — and that 15% to 20% gains for the market are possible in the first half of next year. For more from Siegel on the Fed and economy, check out his recent Wall Street Journal op-ed piece.