Why Commodity Prices Move Up and Down

Understanding why and how commodity prices move higher or lower is the basis for your success in trading commodities. Believe me, there are a lot of commodity traders out there who are trying to take your money – it’s a battle between you and them. You have to be able to incorporate this knowledge into your regular research on commodities to profit from those moves. Otherwise, you may be fighting a losing battle.

Commodity Market Prices

Commodity markets can be very volatile and it may seem like there is no rhyme or reason to their movement. I’ve been trading for more than ten years and I am still amazed at the way prices can move.

The basic explanation I can give you is that commodity prices move because of supply and demand issues. Whenever the market interprets there will be lower supply, prices tend to move higher. Likewise, higher supplies generally mean lower prices.

Now, if you are new to the markets, you are probably wondering how are you supposed to do all this research and figure out whether there will be less supply or demand. The answer is that you do not have to do all the number crunching. There are plenty of analysts out there to do it for you. Your job is to gather the data and decide which way you think prices should move.

Case Study – Corn Market

Let’s go through an example of interpreting the research. Corn futures would be a good example here. In early 2006, corn futures were trading around $2.00 per bushel, which is at the low end of the price range for the past 20 years. The supply of corn was a little tight by historical standards.

The important point here is that the demand was really starting to pick-up, which caused supplies to shrink. Much of this was due to crude oil prices soaring, which rapidly increased the demand for ethanol which happens to be produced from corn. Demand was also increasing from rapidly growing countries like China.

You see how the picture started to come together here. Prices were low for corn and the supply situation started to get really tight. And as the new crop went into the ground, there would be no room for error in a bad crop in the current year.

That is enough to keep the market on edge and it would make traders think twice before selling the market. The result is that prices soared from about $2 per bushel to over $4 per bushel within about a year. That translates into about a 1,000 percent return on margin at the time of the trade.

Commodity Research Sources

Below are many of the most popular sources to research the commodity and futures markets as well as learning about trading.

Daily Commodity and Futures News

  •  Future Source - an excellent source of nearly real-time market news on all the commodity and futures markets. (free)

Market Commentary 

Many of the clearing firms have excellent research. If you are not a client, you can get trial subscriptions.

  • Iowa Grain - specializes in grains and livestock markets.
  • The Hightower Report - an excellent daily report that covers all the markets. (pay service)
  • FuturesBuzz.com - Regular market commentary from a variety of analysts. Full Disclosure: I also provide commentary for this website. (free)
  • Inside Futures - Regular market commentary from a variety of analysts. (free)


  • Futures Magazine - The leading magazine that strictly covers the futures markets.
  • SFO Magazine - Another good magazine that covers stocks, futures and options.


There are three main reasons why commodity prices move higher or lower. The first is the fundamental state of a commodity market. Fundamentals deal with the supply and demand characteristics. If current supplies and inventories exceed demand, a condition of oversupply or a market glut exists and that tends to drive prices lower. On the other hand, if demand is greater than supplies and inventories a deficit condition or shortage exists which tends to push prices higher.

The second reason that commodity prices move up or down is the technical condition of the market. Price charts often drive the behavior of investors, traders, and other market participants. Since everyone looks at the same price charts, the reaction of a pattern often causes a herd of buying or selling which tends to influence prices.

Finally, the prices of commodities are sensitive to changes in the global macroeconomic landscape. Therefore, an event that is either economic, political or caused by nature could influence the prices of commodities.

As you can see, there is a myriad of reasons why commodities move up or down. It is always easier to explain the price movement of a commodity after it occurs than to predict an up or down move. That is why seasoned commodity professions spend lots of time analyzing markets as past behavior is often a useful tool for predicting the future.