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When it comes to trading mini-sized futures contracts, the average trader immediately thinks of the Chicago Mercantile Exchange's (CME) eMini markets. Rarely do traders think of mini gold, mini silver or mini corn. But not too long ago, these markets dominated the small trader landscape.

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For example, in 2003, when the MidAm became a part of the CBOT, gold had reached a low of $322. But between 2003 and 2008, gold shot up to the $1,000 level and oil broke through the $100 per barrel barrier. With this increase in value and volatility, the margins for full-sized commodity contracts practically tripled--mini contracts, however, remained at reasonable levels. (For related reading, see "Trading Gold And Silver Futures Contracts.")

For example, to trade one full-size gold commodities contract in 2008 would require a margin of $4,725, while a mini-gold contract margin would only be $1,121, less than one-quarter of the price.

Figure 1: Margins For Full-Sized Futures Contracts

Contract	Exchange	Symbol	Margin
Corn	CBOT	C	$1,350
Dow Jones	CBOT	DJ	$7,005
Gold (Pit)	COMEX	GC	$4,725
Silver (Pit)	COMEX	SI	$6,075
Soybeans	CBOT	S	$2,970
Wheat	CBOT	W	$6,075

Figure 2: Margins For Mini Futures Contracts

Contract	Exchange	Symbol	Margin
Mini Corn	CBOT	YC	$270
Mini Dow Jones	CBOT	YM	$3,503
Mini Gold	CBOT	YG	$1,121
Mini Silver	CBOT	YI	$810
Mini Soybeans	CBOT	YK	$594
Mini Wheat	CBOT	YW	$1,215

When there is inflationary pressure on global commodities, it becomes very expensive for small speculators to even attempt to participate in, much less profit from, highly volatile markets. As such, trading the mini-CBOT contracts is the best way to get involved without making a huge capital commitment.

Right before the MidAm was acquired by the CBOT, a common complaint about the mini-contracts were the twin problems of slippage and liquidity. However, the current CBOT mini-contracts trade in an electronic marketplace instead of in the trading pit. This minimizes slippage and has increased the market's liquidity by opening it up to traders from around the world. This has made buy and sell prices more reliable and has established a significant level of trading confidence in the markets. (For related reading, see "The Global Electronic Stock Market.")

Even though mini-CBOT contracts are less expensive than full-sized contracts and have more liquidity than they did in the past, they do have a few practical drawbacks.

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In the past, mini hog and cattle contracts were regularly traded on the MidAm, but they never really found an audience in the electronic markets and promptly were eliminated as contract offerings. This same problem found its way into the mini-option market. When the MidAm traded, the mini-option market was a vital component in helping traders develop effective risk management strategies around hedging. The switch to the CBOT eliminated the mini-options market and limited traders to using full-sized options to protect themselves. (For related reading, see "Practical And Affordable Hedging Strategies.")

The lack of an actively traded mini-options market, along with the limited number of available trading orders in the electronic market can make mini-trading difficult. Those who decide to trade in the mini-markets are best off day trading, or actively managing their swing positions.

The lack of the good-'til-canceled (GTC) orders makes it difficult to open a position and forget about it. This forces traders to put in their stop or stop limit orders every day before the market opens if they hope to have the protection that a stop or stop limit order can provide. The lack of this GTC order type makes it difficult for any trader to confidently hold positions overnight. (For related reading, see "The Basics Of Order Entry.")

In spite of a lack of mini-options and GTC orders, the sheer cost-effectiveness of mini contracts far outweighs the disadvantages for many traders. The mini markets are simply the best way to test out new strategies, try out different commodities and try out futures trading with a smaller required investment.

This article is from Investopedia.com , the Web's largest site dedicated to financial education. Click here for more educational articles from Investopedia.

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