This is from my trading buddy, but he quit trading Natural Gas already.
Here is the pros and cons for buying Natural Gas ETF (Not the company).
Natural gas can be traded in the form of futures contract. It can also be trade in the form of ETF e.g. UNG & HNU (x2). It is more convience to trade the ETF for me here in HK.
Introduction
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Natural Gas future contract price is currently at $4.2. Down from peak of $13 July 2008. The mean is about $6-$8.
http://futures.tradingcharts.com/chart/NG/WThe price of natural gas is determine by demand and supply + a bit of speculative factor from people.
The reason we are seeing such low price is because supply is currently high and demand is low (due to low economic activity in the U.S).
Inventory Level
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Inventory level usually rise during the summer and fall during the winter.
Therefore you can not say inventory is rising and therefore price should go down. You need to compare the inventory with same last previous year.
You can see the weekly inventory report from IEA.
http://www.eia.doe.gov/oil_gas/natural_gas/ngs/ngs.htmlAt the moment, inventory level is 30% higher compare to previous year.
Demand
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Natural gas is mainly used for industrial use and for generating electricity. Closing down of factory from GM causes a fall in demand.
It is worth to note that electric plant can substitute coal with natural gas depending on the price. They choose which ever is cheaper. Natural gas is a greener energy and will be used more in the future.
Supply
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Gas are extracted from rigs. Recently people have found ways to extract gas from shale field. Making gas more easy to extract. Currently Supply is above demand and causing the imbalance and depress price.
Oil Gas Ratio
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Normally Oil price div Gas price is approx 8 - 1. However currently the ratio is 20 - 1 i.e. $70 oil price div $4 gas price = approx 20.
People believe this ratio will return to normal eventually. This can be due to people switch from expensive energy to cheaper energy.
Shutting down of active rig by 50%.
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Because gas is so cheap company aren't making any money from producing natural gas. So they have already shut down 50% of the rig. People are expecting this to be reflected in decrease supply.
It is expected that gas supply will decrease by %1 in 2009 and 2.5% in 2010.