Solar energy and China ETFs are outshining the rest of the stock market this December, when the stock market typically enjoys a so-called Santa Claus rally through year's end. Guggenheim Solar (TAN) and Market Vectors Solar Energy (KWT) are up 17.4% and 16.3% for the month so far, respectively. By contrast, SPDR S&P 500 (SPY) is ahead a mere 0.10% at 142.30. PowerShares QQQ (QQQ), tracking the 100 largest nonfinancial stocks on the Nasdaq, has