Our first cold-weather stock isn't actually a stock; it's an exchange-traded fund (ETF). It is United States Natural Gas (UNG), an ETF designed to replicate the performance, net of expenses, of natural gas

The logic for UNG is simple. The colder it is outside, the more we need to heat our homes and offices, and most of us do this via natural gas. The increased demand for natural gas should translate into higher natural gas prices. Of course, sometimes this simple logic isn't quite that simple.

If you live practically anywhere east of the San Andreas Fault, you know about the deep freeze biting the nation. Temperatures in many areas of the country have been way below normal this winter, especially in the Midwest and East Coast, and unfortunately, many meteorologists think the 2010 cold front will bring plenty of chilly nights before it makes its welcome departure.

According to the 2010 Farmers' Almanac, this winter will likely see many more days with below-normal average temperatures. Not just in the Midwest and East Coast, but for about three-quarters of the nation. The fallout from these cold temps is a constriction of outdoor activity, more time indoors, increased use of heaters, and when you have to go outside, the need to bundle up.

"After enduring one of the worst slumps on record, we're beginning to see a rebound in all major commodities market," says Lee Lowell, adding "But one commodity stands out in particular -- natural gas."

In Xcelerated Profits Report, he explains, "This could represent the best buying opportunity in several years." Here's his review of the United States Natural Gas Fund (NYSE: UNG).

"As it so often does, it's no surprise to see the energy market leading commodities higher over the past few weeks -- specifically, crude oil and natural gas.

Here's an idea if you are worried about your heating bills this winter. The price of natural gas is crashing. The price decreases last week continued a down trend that's gone on for six months. Why? The economic downturn slows demand for gas and many companies are announcing layoffs and closing plants around the country. Reduced prices for natural gas are also a result of growing capacity in the U.S. because of increases in production at new fields. Natural gas prices are at multi-year lows falling from 65% from more than $13.31 per MMBtu (the way gas is measured) in July 2008 to under $5 -- the lowest since October 13, 2006.

United States Natural Gas (NYSE: UNG) is an exchange-traded fund (ETF) that reflects the price of natural gas in the United States. UNG attempts to mirror the performance, net expenses, of natural gas at the Henry Hub, Louisiana.