Introduction
Understanding what is MCX basis and how to use it for trading in India is essential for any trader who wants to move beyond watching spot prices in isolation. MCX basis — the difference between the MCX futures price and the prevailing domestic spot price for the same commodity — is one of the most reliable structural signals available to Indian commodity market participants.
The Mechanism
Basis is calculated as:
MCX Basis = MCX Futures Price (INR) − Domestic Spot Price (INR)
When basis is positive, futures trade at a premium to spot — a condition called contango. When negative, futures trade below spot — backwardation.
The transmission works in a precise sequence. A global benchmark price moves first — say, COMEX gold or LME copper shifts on macro data. MCX futures reprice almost immediately because arbitrageurs constantly monitor the spread between the international benchmark, converted at the live USD/INR rate, and the MCX contract. If MCX trades materially above its import parity equivalent — spot price plus customs duty, GST, insurance, and freight — traders bring in physical supply, compressing the futures premium. If MCX trades below import parity, domestic buyers prefer futures over imports, widening demand and pulling prices up. The basis therefore acts as a continuous arbitrage valve: when it widens beyond transaction costs, capital flows to close it; when it narrows, the valve shuts. Tracking how long an abnormal basis persists, and whether it widens or compresses, reveals supply-demand stress in the domestic market before spot prices visibly react.
India-Specific Context
Several structural factors make MCX basis behave differently from raw international price differences. India's basic customs duty on gold currently sits at 6% (after the July 2024 reduction from 15%), and GST adds another 3% — meaning import parity for gold on MCX carries roughly a 9% premium over LBMA spot converted at USD/INR. For base metals like copper and aluminium, anti-dumping duties and port handling costs add further layers. The RBI's management of the rupee introduces an additional variable: even when LME copper is flat, a sharp INR depreciation mechanically widens the MCX basis against spot, creating apparent opportunity that evaporates once currency adjusts. MCX's own circuit filter rules — typically ±3% to ±6% depending on the commodity — can freeze futures mid-move while spot continues to adjust, creating temporary artificial basis distortions that correct at the next session open.
Historical Episodes
In 2020, when COVID-19 logistics disruptions severed physical gold supply chains, the MCX gold basis widened to approximately ₹3,000–₹4,000 per 10 grams above import parity for several weeks — an abnormal premium that historically resolved once air cargo routes partially reopened. In 2022, following Russia's invasion of Ukraine, MCX crude oil futures tracked NYMEX WTI with a lag during extreme volatility sessions; basis swings of ₹300–₹500 per barrel within single sessions reflected circuit-limit-induced freezes rather than genuine domestic divergence. In 2023, when the rupee weakened past 83 against the dollar, MCX copper basis expanded by roughly 2–3% relative to its 12-month average as import parity costs repriced faster than domestic spot could absorb, a pattern observed in past episodes of sharp INR depreciation.
What to Watch
Monitor these specific triggers for basis movement: RBI MPC policy decisions (scheduled bi-monthly, dates published on rbi.org.in) for rupee volatility; COMEX/LME settlement prices daily at 11:30 PM and 6:30 AM IST; live USD/INR on RBI reference rate page; MCX circuit filter breach alerts in the trading terminal; DGFT notifications on import duty changes; and domestic spot rates published by India Bullion and Jewellers Association (IBJA) for gold or Indian Metal Bulletin for base metals. A basis that widens sharply on no change in global prices almost always signals a domestic supply or currency event in progress — that is precisely when what is MCX basis and how to use it for trading in India becomes actionable intelligence rather than academic exercise.