Here is the ETF Professor's ETF Watch List for Friday May 21, 2010. On news of possible central bank intervention to boost the Aussie Dollar, watch the CurrencyShares Australian Dollar Trust (NYSE:

). Watch the Claymore/Alpha Shares China Small-Cap ETF (NYSE:

) due to yesterday's unusual options trade. With precious metals looking weak, try the ProShares UltraShort Silver (NYSE:

). The iShares MSCI Brazil Index (NYSE:

) was down almost 5% on Thursday. Embrace emerging markets from the short side with the Direxion Daily Emrg Markets Bear 3X Shares (NYSE:

). With Europe looking weak again, try the ProShares Short MSCI EAFE (NYSE:

). If oil continues to sell off, try the ProShares UltraShort Oil & Gas (NYSE:

).