How to Trade Aluminium on MCX: Lot Size, Margin and a Worked Example

What You Are Actually Trading on MCX Aluminium

MCX Aluminium is a futures contract on primary aluminium metal, and the single most important number to burn into memory is the lot size: 5 metric tonnes, which equals 5,000 kg. The price you see on the ticker, for example Rs 248.50, is the price per kilogram. To get the value of one full contract you multiply the per kg price by 5,000. At Rs 248.50 per kg the contract value is 248.50 times 5,000, which is Rs 12,42,500. That is the notional you are controlling with a margin of only about Rs 20,000, and that gap is exactly why aluminium can be rewarding and dangerous in the same breath.

The exchange also runs Aluminium Mini at 1 metric tonne, that is 1,000 kg, for traders who find the 5 MT contract too heavy. The Mini moves rupee for rupee like the main contract but a price move hits your account at one fifth the size. The tick size on aluminium is Re 0.05 per kg, so the smallest price step on a 5 MT lot is 0.05 times 5,000, which is exactly Rs 250 per tick per lot. Knowing your rupees per tick is the foundation of any honest risk plan, because it lets you convert a stop in price terms into a real rupee loss before you click buy.

Aluminium futures on MCX are physically deliverable at expiry through MCX accredited warehouses, but in practice the overwhelming majority of retail and trading participants square off before the delivery window opens, so you trade it as a cash style position and never see a single ingot. If you carry into the delivery period without an intention to give or take delivery, you can face delivery obligations and penalties, so always roll or exit ahead of the tender and delivery dates published in the contract specification.

MCX Aluminium Contract Specifications at a Glance

Before you place a single order, you should be able to recite the contract specs without looking them up. The table below shows the headline numbers for the standard and Mini aluminium contracts. Treat the margin and price figures as illustrative because MCX revises margins with volatility and prices move every second, but the lot sizes and tick are structural and rarely change.

Worked Example: A Real 5 MT Aluminium Long Trade With Charges

Let us walk through a complete, realistic long trade with correct lot maths and the actual charges that hit a commodity trade in India. These numbers are illustrative and for learning only. Suppose on the morning of an MCX session, the front month Aluminium future is trading at Rs 246.00 per kg. You expect strength on the back of firm London Metal Exchange prices and a softer rupee, so you buy one standard lot, that is 5,000 kg. Your buy contract value is 246.00 times 5,000, which is Rs 12,30,000. Your broker blocks roughly Rs 22,000 as margin, so you are running about 56 times leverage on the blocked amount.

By the afternoon the price rises to Rs 250.00 per kg and you decide to book. Your sell contract value is 250.00 times 5,000, which is Rs 12,50,000. The gross profit before costs is the Rs 4 per kg move times 5,000 kg, which is Rs 20,000. That clean number is what most beginners stop at, but it is not what lands in your account. Now we subtract the real costs.

• Brokerage: a typical discount broker charges Rs 20 per order for commodity futures. Two legs, buy and sell, so Rs 40 total.
• CTT (Commodity Transaction Tax): 0.01% on the sell side turnover only. That is 0.0001 times Rs 12,50,000, which is Rs 125.
• Exchange transaction charges: roughly 0.0026% on both legs combined. On about Rs 24,80,000 of total turnover that is about Rs 64.
• GST: 18% on (brokerage plus exchange charges). 18% of about (Rs 40 plus Rs 64), which is about Rs 19.
• SEBI turnover fee and stamp duty: a few rupees combined, call it about Rs 12 on this size.

Adding the costs: Rs 40 plus Rs 125 plus Rs 64 plus Rs 19 plus Rs 12 is about Rs 260 in total charges. So your net profit is roughly Rs 20,000 minus Rs 260, which is about Rs 19,740 on one standard lot. Against a margin of about Rs 22,000 that is a return near 90% on margin in a single session, which also tells you the flip side: had aluminium fallen Rs 4 to Rs 242 instead, you would have lost about Rs 20,000 plus costs, wiping out most of that same margin. This is why a hard stop loss, defined in rupees per lot before entry, is not optional.

How Aluminium Profit Compares to a Bank Nifty Options Trade

Many readers also trade index F&O, so it helps to anchor aluminium against something familiar. Take a Bank Nifty monthly option example, again purely illustrative. Bank Nifty lot size is 30. Say you buy one lot of a Bank Nifty 50000 call at a premium of Rs 300. Your outlay is 300 times 15, which is Rs 4,500. If the call rises to Rs 420, your gross profit is the Rs 120 premium gain times 15, which is Rs 1,800, before brokerage, STT on the sell side of options, exchange fees and GST. Note that index and stock F&O carry STT, while commodities like aluminium carry CTT instead, and they are different line items.

The structural difference is risk shape. A long option has a capped loss equal to the premium paid, here Rs 9,000, no matter how far Bank Nifty falls. An aluminium futures position has open ended risk on both sides, scaled by 5,000 kg, so a Rs 4 adverse move is Rs 20,000 whether you like it or not. Futures give you a linear, delta one exposure with no time decay, which suits trend traders, while options give you defined risk but bleed theta. Neither is better, they are different tools, and the lot maths differs sharply: Bank Nifty risk scales by 30 units of premium, aluminium scales by 5,000 kg of metal.

Margins, Mark to Market and How You Get Stopped Out by the Exchange

MCX margin has two main layers: the SPAN margin, set by a risk model, and an additional exposure margin. Together they typically run around 8% to 10% of contract value on aluminium, so for a Rs 12.3 lakh contract you block roughly Rs 18,000 to Rs 26,000. The exchange raises margins when volatility spikes, often intraday, so a position you opened comfortably in the morning can demand more margin by afternoon, and your broker will issue a margin call.

Every day your open position is marked to market against the daily settlement price. Profits are credited and losses are debited from your ledger in cash, daily, not only when you finally exit. If your account cannot meet the mark to market or a fresh margin call, the broker can square off your position at market, frequently at the worst possible moment. The practical lesson is to keep a cash buffer well above the bare minimum margin, ideally enough to absorb a Rs 3 to Rs 4 per kg adverse swing, which on a standard lot is Rs 15,000 to Rs 20,000, without breaching maintenance levels.

• Initial margin (SPAN plus exposure) is blocked the moment you open the position.
• Mark to market settles paper gains and losses in cash every single trading day.
• A margin call asks for fresh funds when your balance dips below the maintenance level.
• If you ignore a margin call, the broker can and will square off your lot at market.

What Actually Drives MCX Aluminium Prices

MCX aluminium is not a standalone Indian price, it is largely a rupee converted shadow of the London Metal Exchange (LME) three month aluminium price plus the USDINR exchange rate. When LME aluminium rises overnight, MCX usually gaps up at the open, and a weaker rupee adds further to the rupee price because the imported benchmark becomes more expensive in local terms. This is why two screens matter before you trade aluminium: the LME price and the USDINR rate.

On the fundamental side, the demand drivers are industrial: construction, automobiles, power transmission, packaging and renewable energy hardware. China is the dominant producer and consumer, so Chinese smelter output, power rationing in Chinese provinces, and Chinese property and infrastructure demand swing global prices hard. On the supply side, energy costs matter enormously because aluminium smelting is electricity intensive, so a spike in power or coal costs can lift the cost floor for the whole metal. Inventory levels in LME and Shanghai warehouses act as a real time gauge of tightness.

• LME three month aluminium price, the global anchor that MCX tracks almost tick for tick after currency adjustment.
• USDINR rate, since a weaker rupee pushes the rupee aluminium price up even if the dollar price is flat.
• Chinese smelter output, power policy and property demand, the single biggest swing factor for the metal.
• Energy and power costs, because smelting is power hungry and energy spikes raise the cost floor.
• LME and SHFE warehouse inventory, a direct read on whether the market is tight or oversupplied.

Taxes on Aluminium Trading: CTT and Business Income, Not Capital Gains

This is where many traders get it wrong, so be precise. Commodity futures like aluminium attract CTT, the Commodity Transaction Tax, not the STT you know from equities. For non agricultural commodity futures, CTT is 0.01% on the sell side of the turnover. There is no separate STCG or LTCG concept for these trades, because you are not holding a capital asset, you are running a business style derivative position.

For income tax, profit from trading commodity futures on a recognised exchange like MCX is treated as non speculative business income, the same bucket as equity F&O. It is added to your total income and taxed at your applicable slab rate, and it is reported under business income in your return, typically requiring an ITR 3. The upside is that you can deduct legitimate trading expenses, such as brokerage, exchange charges, internet, data subscriptions and depreciation on equipment, against this income, and you can carry forward non speculative business losses for up to eight years to set off against future business profits, subject to filing on time. Capital gains rules that apply to delivery based equity, namely STCG at 20% and LTCG at 12.5% above Rs 1.25 lakh, do not apply to your aluminium futures profits at all.

A Simple, Disciplined Way to Start

If you are new to MCX aluminium, do not begin with the standard 5 MT lot. Begin with Aluminium Mini at 1 MT, where a Re 1 per kg move is Rs 1,000 rather than Rs 5,000, so a mistake costs one fifth as much while you learn how the metal behaves around the open and around LME closing hours. Open a commodity enabled trading account with a SEBI registered broker that is an MCX member, complete the commodity segment activation, and fund it with risk capital you can afford to lose, never borrowed money.

Build a written plan before each trade: the entry, the stop in rupees per lot, the target, and the maximum number of lots. A common, conservative rule is to risk no more than 1% to 2% of your trading capital on a single aluminium trade. On a Rs 2 lakh account that is Rs 2,000 to Rs 4,000 of risk, which on a Mini lot maps to a stop of Rs 2 to Rs 4 per kg, a realistic band for this metal. Journal every trade, including the costs, so your profit and loss is net of charges and not the flattering gross number.

• Start on the Mini (1 MT) contract so each rupee move is Rs 1,000, not Rs 5,000.
• Risk a fixed 1% to 2% of capital per trade and translate that into a rupees per kg stop before entry.
• Watch LME aluminium and USDINR alongside the MCX chart, since they lead the rupee price.
• Roll or exit well before the tender and delivery dates to avoid unwanted delivery obligations.
• Record every trade net of brokerage, CTT, exchange fees and GST, not just the gross move.

Common Mistakes That Quietly Drain Aluminium Accounts

The most expensive mistakes in aluminium trading are not exotic, they are basic and repeated. The first is mis sizing, taking a standard 5 MT lot when your account can only stomach a Mini, so a normal Rs 3 swing becomes an account threatening Rs 15,000 hit. The second is ignoring the LME and currency lead, then being shocked by a gap open that was fully visible on the overnight LME screen. The third is holding into delivery by accident, which can trigger penalties for a trader who never intended to handle physical metal.

A fourth and very human error is averaging into a loser, adding lots as the price falls in the hope of a bounce, which on a leveraged 5,000 kg contract simply multiplies the mark to market bleed and can invite a forced square off. Pair that with no stop loss and you have the classic blow up. Discipline, fixed risk per trade, and respecting the daily mark to market are what separate traders who last from those who fund the market for a few months and quit.

Final Word and Where to Verify the Numbers

Aluminium can be a rewarding instrument because it trends with clear, watchable global drivers, but its 5,000 kg standard lot means every small price move is large in rupee terms, and that cuts both ways. Treat the lot size, the tick value, the margin and the daily mark to market as the non negotiable mechanics, and treat your stop loss as the price of admission. Every figure in this guide is illustrative for learning and changes daily, so confirm live contract specifications, margins and charges on the official sources before you commit real money.

For authoritative and current data, refer to MCX (Multi Commodity Exchange), the Reserve Bank of India for currency context, and SEBI (Securities and Exchange Board of India) for regulations. Always confirm current rules, rates and contract specifications on the official source before you trade.

Sources and Further Reading

For authoritative data and further reading on this topic, refer to MCX (Multi Commodity Exchange), Reserve Bank of India and SEBI (Securities and Exchange Board of India). Always confirm current rules, rates and contract specifications on the official source before you trade.