MCX Lot Size

The fixed quantity behind every contract

On the Multi Commodity Exchange (MCX), India's largest commodity derivatives exchange, you cannot trade any quantity you like. Each commodity has a standardised lot size, the fixed minimum quantity that makes up one futures contract. This standardisation ensures uniformity, so every contract for a given commodity is identical and easily traded, which is what creates liquidity in the first place.

The lot size, combined with the price, determines the total contract value, and that in turn sets the margin (the upfront deposit) you must put up to trade. Lot size is therefore the first thing a commodity trader must understand, it dictates how much money is at stake per contract.

The standard contracts

MCX's main contracts have well-known lot sizes. Gold trades in a 1 kg lot, Silver in 30 kg, and Crude Oil in 100 barrels. Because these full-size contracts are large, often worth lakhs of rupees, MCX also offers smaller variants to suit retail traders with less capital: Gold Mini, Gold Petal (1 gram), Silver Mini and Silver Micro, and Crude Oil Mini (10 barrels), among others.

A full silver contract, for instance, can be worth several lakh rupees of underlying metal, so even with leverage the margin runs high. The mini and micro contracts let smaller traders participate with far less capital and risk per lot.

What traders must keep in mind

Understanding lot size is essential for position sizing and risk management. Because of leverage, a single MCX lot controls a value many times the margin posted, so even a small adverse price move can produce an outsized loss relative to capital. New traders frequently underestimate this, taking a full-size lot whose value, and potential loss, far exceeds what they intended to risk.

The exchange periodically revises contract specifications, including lot sizes and margins, especially after sharp price moves, so traders should always check the latest specs on the MCX before trading. The practical discipline is simple: calculate the full contract value (lot size times price), assess the margin and the worst-case loss for a realistic price swing, and choose a contract size, full, mini or micro, that fits your capital. In leveraged commodity trading, lot size is where prudent risk management begins.