Most Widely Traded ETFs in April

A relentless upward march in oil prices and a bounce in real estate elevated two exchange-traded funds onto TheStreet.com Ratings list of the 20 most popular exchange-traded funds for April.

The accompanying table of the 20 ETFs with the largest average daily dollar volume of trading for the month includes the United States Oil FundUSO and the iShares Dow Jones U.S. Real Estate ETFIYR, each of which ranked outside the top 20 a month earlier.

They were joined as new members by the SPDR Mid Cap 400MDY. The MDY ETF becomes the only mid-cap fund in the top 20.

The five-highest dollar turnover funds remained in the same sequence as in the previous month, led by the granddaddy of all ETFs, the "Spider" SPDR S&P 500 ETFSPY, with $24.68 billion in average daily trading volume for the month.

Even though the popular stock market indices enjoyed bounces in the 4% to 6% range during April, four ProShares "Ultra Short" leveraged inverse funds remained on the list of the 20 most popular ETFs. But while the ProShares Ultra Short QQQQID, which moves inversely at double the amplitude of the Nasdaq 100 index, slipped from sixth to ninth position, the "real deal" PowerShares QQQQQQQ, commonly referred to as the "Cubes," remained in second place on the array.

Similarly, the ProShares Ultra Short FinancialsSKF skidded from 10th spot to 13th on the list while a "long" financial ETF, the Financial Select Sector SPDRXLE, held steady in the fourth spot.

The index of the 100 biggest Nasdaq-listed funds proved to be the most popular market gauge among the most ETFs on the list. Joining the QQQQ and the QID in using the index, the leveraged ProShares Ultra QQQ QLD moved from 17th a month earlier to 16th at the end of April.

As for ETFs that were in the top 20 a month earlier and fell off the list in April, the weakening economy and its dampening impact on consumer sentiment resulted in HOLDRs RetailRTH dropping out of the table. The other dropouts from March were the Materials Select Sector SPDRXLB and the iShares MSCI JapanEWJ.

As for sectors, the aforementioned U.S. Oil Fund was joined by the Energy Select SPDRXLF andHOLDRs Oil ServicesOIH to provide choices in the energy realm.

Emerging markets -- specifically, the popular BRIC (Brazil, Russia, India and China) funds -- are represented in the table by the iShares MSCI Emerging Markets ETFEEM in the fifth spot, by number 13 in iShares FTSE/Xinhua China 25FXI and in the 15th spot the iShares UMSI Brazil ETFEWZ.

Twelve of the 20 favorite ETFs outperformed the SPDR S&P 500, which mimics "the market," while seven underperformed the popular benchmark. Six of the ETFs achieved double-digit gains for the month, while five ended with negative returns for the month.

Two of the members of the table sport the highest possible grades of A+ from TheStreet.com Ratings; seven have marks in the "B" range as "buy" recommended. Eight ended with grades in the "C" range, which equate with "hold" recommendations. Two ETFs with grades in the "D" range and one with the lowest possible mark of E- are tagged as "sell" recommendations.

The estimated average daily dollar volume figures for the month are computed by multiplying each fund's average daily share turnover by the geometric average of the fund's March and April closing prices.

Most Popular ETFs for April 2008
APR. 2008 RANK	PRIOR MNTH RANK	NAME, TICKER & TheStreet.com RATINGS GRADE	APR. AVG. DAILY DOLLAR VOL. ($MIL)	APR. TOTAL RET'N (%	3-MO. TOTAL RET'N (%)
1	1	SPDR S&P 500 ETF (SPY) C+	24,682.8	4.77	1.14
2	2	PowerShares QQQ (QQQQ) C	5,378.4	7.98	4.69
3	3	iShares Russell 2000 (IWM) D	4,076.3	4.55	0.81
4	4	Financial Select Sector SPDR (XLE) D	2,566.7	7.00	-8.00
5	5	iShares MSCI Emerging Markets (EEM) C+	2,022.2	9.14	7.14
6	7	DIAMONDS Trust (DIA) B	1,669.4	4.86	2.30
7	9	Energy Select Sector SPDR (XLE) B+	1,628.0	10.38	17.79
8	11	streetTRACKS Gold Shares ETF (GLD) A+	1,437.7	-4.16	-5.20
9	6	ProShares Ultra Short QQQ (QID) C+	1,421.8	-14.97	-13.21
10	14	HOLDRS Oil Services (OIH) B-	1,393.6	12.34	26.35
11	13	iShares FTSE/Xinhua China 25 (FXI) B+	1,178.2	17.50	10.22
12	8	ProShares Ultra Short S&P 500 (SDS) B-	1,120.6	-9.97	-5.26
13	10	ProShares Ultra Short Financials (SKF) C	1,088.5	-14.05	4.16
14	16	iShares MSCI EAFE (EFA) B-	1,054.7	5.44	4.80
15	12	iShares MSCI Brazil (EWZ) B	1,023.1	17.25	18.08
16	17	ProShares Ultra QQQ (QLD) E-	887.4	15.58	7.73
17	23	SPDR Mid Cap 400 (MDY) C+	725.7	7.92	4.79
18	18	ProShares Ultra Short Russell 2000 (TWM) A+	571.2	-9.94	-7.14
19	24	United States Oil Fund (USO) C+	557.2	13.69	27.85
20	22	iShares Dow Jones US Real Estate (IYR) C-	540.7	5.81	5.89
Data as of 4/30/2008. Source: TheStreet.com Ratings & Bloomberg For an explanation of our ratings, click here.