ETF Symbol: Price 39.93 Volume 9200 Avg Vol 38800 RSf 9.9 $Vol(21d) 2m 52 wk High 49.87 52 wk Low 37.23 (as of 2010-09-09) Total Returns: 1 day -0.6% 5 day -2.6% 1 month -0.1% 3 month -3.8% 6 month -2.2% 9 month -14.0% 1 year -18.5%   Compare Funds: Correlated Group: US Brd Mkt (View cGroup) (All Groups)

Correlated Funds

Most Correlated   Least Correlated Proshares UltraShort Midcap 400 MZZ 1.00 iShares Russell MidCap Growth Index Fund IWP -0.99 ProShares UltraPro Short MidCap400 SMDD 1.00 iShares Russell MidCap Index Fund IWR -0.99 Direxion Daily Mid Cap Bear 3X Shares MWN 0.99 Vanguard Mid-Cap VO -0.99 Proshares UltraShort Russell2000 TWM 0.98 Direxion Daily Mid Cap Bull 3X Share MWJ -0.99 Proshares Short Russell 2000 RWM 0.98 Vanguard Extended Market VXF -0.99 Direxion Small Cap Bear 3X Shares TZA 0.98 iShares S&P MidCap 400 Value Index Fund IJJ -0.99 Proshares UltraShort SmallCap600 SDD 0.98 iShares S&P MidCap 400 Growth Index Fund IJK -0.99 Direxion Large Cap Bear 3X Shares BGZ 0.97 iShares S&P MidCap 400 Index Fund IJH -1.00 Proshares Short SmallCap600 SBB 0.97 MidCap SPDR MDY -1.00 Proshares UltraShort Russell2000 Growth SKK 0.97 ProShares Ultra Midcap 400 MVV -1.00

These 126 day (6 month) correlations can be considered short term, focusing on recent price movements. Correlations are only calculated for actively traded funds. As of: 2010-09-03.

Exchange-traded funds are similar to index funds that trade like a single stock. Until the advent of the ETF, it was impossible to trade indexes this easily through an equity account. Most ETFs are relatively static in make-up, like the SPY or QQQQ index funds. Others, like some of the PowerShares funds, are dynamic and the holdings are changed routinely. ETFs have risks similar to stocks in that their value can rise or fall at the discretion of the marketplace. Some ETFs, like international funds and narrowly based indexes, have special risks that the investor should be aware of. However, used properly ETFs can provide an efficient and effective investment vehicle for achieving results that were near impossible for the typical investor to achieve prior to their development.