NEW YORK ( TheStreet) -- Here are this week's winners and losers.
While commodity-backed natural gas plays suffered this week, FCG and AMJ, which track natural gas via the companies that explore, develop, transport and store the fuel, managed to stay in the black. iPath Dow Jones-UBS Grains Subindex Total Return ETN ( JJG) -3.0% PowerShares DB Agriculture Fund ( DBA) -1.7% Sinking grain prices weighed heavily on commodity backed agriculture ETFs like JJG and DBA this week. Futures prices saw a drop thanks to a strengthening dollar and a more optimistic weather forecast for major growing regions including the Midwest and South America. CurrencyShares British Pound Sterling Trust ( FXB) -0.7% The pound got punished this week for a variety of factors. At the start of the week I mentioned two headwinds that have weighed on the currency's strength over the past few days. For one, it was announced on Monday that U.K.-based Prudential ( PUK) had offered AIG ( AIG) more than $35 billion for its Asian life insurance business, AIA. This cash-heavy deal will involve selling pounds in exchange for dollars. Secondly, investors have begun to worry about the U.K.'s ability to rein in its growing debt. With elections coming up, the Conservative Party, which investors see as more apt to employ fiscal discipline, has seen its once-impressive lead over the Labor party cut significantly. -- Written by Don Dion in Williamstown, Mass.