XShares Advisors is closings out a specialty exchange traded fund which gave investors exposure to the carbon credits market.

The AirShares EU Carbon Allowances ETF (ASO) gave “green” investors exposure to carbon offsets, however, the trading volume never quite took off. As of July 31, the ETF will officially close, and holders can sell shares now and ahead of the closure, but XShares said the fund will begin liquidating its portfolio effective immediately, says Jon C. Ogg for 24/7 Wall Street.

The ETF was a way for investors to take advantage of the cap-and-trade market and to do so seamlessly with an ETF. Transaction costs at the time of the portfolio’s liquidation should be noted.

Investors can still take advantage of the cap-and-trade market with the iPath Global Carbon ETN (GRN), which is an exchange traded note. The fund is down 7.8% year-to-date.

For more stories about green ETF investing, visit our green ETF category.

Tags: ASO, Cap-and-Trade, Green ETFs, Sector ETFs, Socially Responsible ETFs