NEW YORK ( TheStreet) -- Exchange traded securities tied to the price of natural gas are leaking shareholder value.The iPath Dow Jones-UBS Natural Gas Total Return Sub-Index ETN ( GAZ), the worst-performing fund in the five trading days through Aug. 13, flamed off 7.6% of its market value. The exchange traded fund that tracks the performance of Henry Hub natural gas futures contracts, United States Natural Gas Fund LP ( UNG), lost 5.5% of its value. Henry Hub natural gas dropped 12% during that time. Low price for gas is dissuading utilities from converting to more environmentally friendly and more expensive solar and wind power. Five of the worst-performing funds focus on clean-energy companies. Leading the pack lower was the Market Vectors Solar Energy ETF ( KWT), which declined 4.9%. LDK Solar ( LDK) and JA Solar Holdings ( JASO), two holdings, each recorded declines of 21% after disappointing investors with quarterly losses. Other solar positions include China Sunergy ( CSUN), off 14%; Solarfun Power Holdings ( SOLF), also down 14%; and GT Solar International ( SOLR), off 12%.
Double-digit gainers include 16% in Alpha Natural Resources ( ANR), 13% in Patriot Coal ( PCX) and 12% in Consol Energy ( CNX). Unlike natural gas, coal is easy to transport. Consol Energy reported the sale of 88,000 tons of U.S. mined steel-making coal to a buyer in China. As China continues its economic stimulus and imports more coal, demand for this fuel and the companies that mine it may allow investors who get in early to clean up.