The third quarter of 2008 was a tough investing time period across the board, but the TheStreet.com Ratings' list of the quarter's worst exchange-traded funds reveals some of the hardest-hit sectors.

Competition for World's Worst ETF was fierce with the slaughter on the markets, but our winners all came from the energy and commodities sector that in the beginning of 2008 were the darlings of the investment world.

The worst-performer for the quarter ended Sept. 30 was the First Trust ISE-Revere Natural Gas ( FCG), which lost 41.18% during that three-month time frame. But investors in any of these other five funds also have good reason to cry.

Worst ETFs of the Third Quarter
Fund Name
Ticker
Current Grade
Previous Grade
Three-Month Return
Category
First Trust ISE-Revere Natural Gas
FCG
E+
C-
-41.18
Equity Income
iPath S&P GSCI Total Return Idx ETN
GSP
E+
C-
-35.88
Growth - Domestic
GS Cnct S&P GSCI Enh Cmd TR Str Idx
GSC
E+
C-
-34.57
Growth - Domestic
PowerShares DB Commodity Idx Track
DBC
C-
A+
-34.21
Growth - Domestic
PowerShares DB Agriculture Fund
DBA
D+
B
-33.1
Equity Income
Market Vectors Global Alt Energy
GEX
E-
D+
-27.32
Sector - Energy/Natural Res
Source: TheStreet.com Ratings
Sam Patel, CFA, is the manager of mutual fund research for the TheStreet.com Ratings.

In keeping with TSC's Investment Policy, employees of TheStreet.com Ratings with access to pre-publication ratings data must pre-clear any potential trade through the legal department, and are prohibited from trading any security that is the subject of an unpublished rating revision until the second business day after the rating is published.

While Patel cannot provide investment advice or recommendations, he appreciates your feedback; click here to send him an email.

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