The Wall Street Journal is reporting that the Energy Department has discovered that it has been overstating U.S. natural gas production data.

UNG

Turns out that the Energy Information Administration was only collecting output information from large producers and then estimating production from the rest of the industry.  The agency is revising its methodology and expects to use the new approach in the April 30 report on February production.

The largest natural gas ETF is the $2.8 billion United States Natural Gas Fund (UNG).

For more investing choices, see the special report Investing in Natural Gas with Exchange Traded Funds.