Copper mcx From the Sumitomo Scandal to Contract Specifications Mastering the Art of Trading

Selecting the Right Contract to Trade: Expiry Logic

Crude Oil futures contracts on MCX are introduced on a six-month forward basis. A contract launched in November, for instance, will carry an expiry date in May of the following year. Each month, a new contract is introduced six months ahead of its expiry date, maintaining a rolling series of active contracts across different expiry months simultaneously.

Three points capture the essential logic of this structure.

First, a new contract is launched every month, with its expiry set six months into the future. Second, each contract expires on or around the 19th of its expiry month. Third, each contract therefore has an active market life of approximately six months from the date of its introduction to the date of its expiry.

For active traders, the practical implication is clear. Liquidity is highest in the nearest expiry contract. As each front-month contract approaches its final days, typically around the 15th or 16th of the expiry month, the prudent course is to roll the position forward into the next month’s contract, where liquidity is building. The contracts further along the expiry curve exist in the market but attract minimal trading activity until they move closer to becoming the front-month contract. Trading in illiquid far-dated contracts carries the same execution risks discussed in the context of less liquid currency and Gold contract variants: wider bid-ask spreads, greater slippage, and reduced ability to exit at desired prices.

The Crude Oil Mini Contract

The Crude Oil Mini contract has earned considerable popularity among retail traders for two practical reasons. The margin requirement is substantially lower than that of the Big Crude contract, and the P&L per tick is proportionally smaller, reducing the psychological and financial impact of adverse price movements on a per-lot basis. The latter point is more significant than it might initially appear: research into trader behaviour consistently suggests that participants are more comfortable sustaining smaller incremental losses than larger ones, even when the risk-to-reward ratio is equivalent.

The contract specifications for Crude Oil Mini are as follows.

The price is quoted per barrel, consistent with the Big Crude contract. The lot size is 10 barrels, compared to 100 barrels for the primary contract. The tick size is Rs. 1 per barrel, producing a P&L per tick of Rs. 10 per lot. Expiry falls on the 19th or 20th of each month, mirroring the Big Crude expiry schedule. The delivery unit is 50,000 barrels and physical delivery takes place at Mumbai or JNPT Port, identical to the primary contract.

With Crude Oil currently trading in the range of Rs. 8,500 to Rs. 9,000 per barrel on MCX as of March 2026, the contract value of a single Crude Oil Mini lot is calculated as follows.

10 barrels multiplied by Rs. 8,750 per barrel equals Rs. 87,500.

Applying a NRML overnight margin rate of approximately 9.5 per cent yields a margin requirement of approximately Rs. 8,312 per lot. The intraday MIS margin rate of approximately 4.8 per cent reduces this to approximately Rs. 4,200 per lot. Both figures represent a significantly more accessible entry point than the Big Crude contract, whilst providing exposure to the same underlying commodity and the same price movements on a per-barrel basis.

The only meaningful structural difference between the Big Crude and Crude Oil Mini contracts is the lot size. Every other specification, including price quotation basis, tick size, expiry schedule, and delivery terms, remains consistent between the two. A trader who understands one contract understands the other.

Crude Oil Arbitrage

An interesting characteristic of having two contracts on the same underlying commodity trading simultaneously is that, under normal market conditions, both should trade at the same per-barrel price. The underlying asset is identical: one barrel of WTI Crude Oil is one barrel of WTI Crude Oil regardless of whether it is held within a 100-barrel lot or a 10-barrel lot. When both contracts reflect fair value, their per-barrel prices will converge.

Occasionally, however, a price discrepancy appears between the two contracts. When it does, a risk-free arbitrage opportunity briefly exists.

Consider a scenario in which the Big Crude contract is trading at Rs. 8,755 per barrel whilst the Crude Oil Mini is trading at Rs. 8,751 per barrel. The arbitrage spread is Rs. 4 per barrel. To capture this spread, the trader buys the cheaper instrument and simultaneously sells the more expensive one.

In this case, the trader buys Crude Oil Mini at Rs. 8,751 and sells Big Crude at Rs. 8,755.

To ensure that the two positions are of equivalent size, the contract values must be equalised. The Big Crude contract covers 100 barrels per lot. The Crude Oil Mini covers 10 barrels per lot. One lot of Big Crude is therefore equivalent to 10 lots of Crude Oil Mini. The trade setup is accordingly to buy 10 lots of Crude Oil Mini and sell 1 lot of Big Crude simultaneously.

The contract value of the Big Crude position is 100 multiplied by Rs. 8,755, equalling Rs. 8,75,500. The combined contract value of 10 lots of Crude Oil Mini is 100 barrels multiplied by Rs. 8,751, equalling Rs. 8,75,100. The positions are nearly equivalent in size, and the 4-point per-barrel spread is locked in regardless of subsequent price direction.

To illustrate the convergence mechanics, suppose both contracts subsequently settle at Rs. 8,770 per barrel. The Mini position generates a gain of Rs. 19 per barrel (8,770 minus 8,751), whilst the Big Crude short position generates a loss of Rs. 15 per barrel (8,770 minus 8,755). The net gain is Rs. 4 per barrel across 100 barrels, producing a total profit of Rs. 400 on the combined position. The direction of the price move is irrelevant: the 4-point spread is secured at the moment both legs are executed.

In practice, such opportunities are short-lived. Algorithmic trading systems are designed to identify and act on price discrepancies of this nature within milliseconds, closing the gap before most manual traders are able to respond. Nevertheless, these dislocations do occasionally persist for several minutes, particularly during periods of low liquidity or unusual market activity. Awareness of the arbitrage structure and the ability to execute both legs simultaneously when the opportunity arises is a useful addition to a commodity trader’s toolkit.

With the Crude Oil discussion concluded, the series moves forward to examine the metals complex, beginning with the contracts, pricing dynamics, and fundamental drivers of the remaining key commodities traded on MCX.