Spread margin benefit
Also written Calendar spread margin benefit
The lower overall margin SEBI permits on a spread position versus margining each leg on its own — up to 75% for the same commodity, up to 50% across two related commodities.
In plain language
A spread position holds two offsetting futures legs at once — long one expiry or commodity, short another. Because the two legs tend to move together, the whole position is far less risky than either leg would be on its own.
Exchanges recognise this by charging less margin on a spread than they would on the two legs added up separately. SEBI's circular on this puts a specific cap on how much lower that margin can be, so the benefit is real but bounded.
How it works
The workbook cites a March 2023 SEBI circular on spread margin benefit. For a spread within the same underlying commodity, the benefit can reduce required margin by up to 75 per cent of the total initial margin the two legs would otherwise need independently. For a spread across two different commodities in the same commodity complex, the cap is lower — up to 50 per cent.
The cross-commodity benefit is not automatic: regulations require a correlation of at least 0.90 between the two commodities before that spread margin can be applied. Extreme Loss Margin, by contrast, still applies individually to each leg regardless of the spread benefit on initial margin. The benefit is also limited to spreads where each leg is among the first six expiring contracts — a spread using a far-dated contract beyond that window does not qualify.
A worked example
A trader's two legs of a gold calendar spread would need Rs 4,00,000 of initial margin each if margined independently — Rs 8,00,000 in total.
Because both legs are the same commodity and within the first six expiring contracts, the 75 per cent same-commodity spread benefit applies:
Margin saved = 75% x Rs 8,00,000 = Rs 6,00,000
Margin actually required = Rs 8,00,000 - Rs 6,00,000 = Rs 2,00,000
Had he instead run a gold-versus-silver spread across two different commodities in the bullion complex, with a correlation of 0.92 between them, only the 50 per cent cap would apply: Rs 8,00,000 x 50% = Rs 4,00,000 saved, leaving Rs 4,00,000 of margin required — double what the same-commodity spread needed, even though both legs individually looked similar in size.
Why NISM asks about it
Chapter 5 (Uses of Commodity Derivatives), section 5.5, "Lower Margin for spread trading," which introduces the March 2023 circular right after the mechanics of spread trading. Expect a question on the two different percentage caps — 75% same commodity, 50% cross-commodity — and on the 0.90 correlation condition for the cross-commodity case.
Common exam traps
- 75% is the cap for spreads within one commodity; 50% is the cap for spreads across two commodities in the same complex — swapping these is the most common error.
- The cross-commodity benefit needs a correlation of at least 0.90. Below that, the full independent margin applies.
- Extreme Loss Margin still applies to each leg individually — the spread benefit reduces initial margin, not every margin component.
- The benefit only applies within the first six expiring contracts — it is not available on every expiry an exchange lists.
Check yourself
1.Under SEBI's March 2023 circular on spread margin benefit, what benefit applies to a spread in two different commodities forming a commodity complex?
- a)Up to 75% of the total initial margin, with no correlation requirement
- b)Up to 50% of the total initial margin, provided a correlation of 0.90 exists between the two commodities
- c)Up to 50% of the total initial margin, provided a correlation of 0.60 exists
- d)A complete waiver of initial margin on both legs
Show the answer
Answer: (b) Up to 50% of the total initial margin, provided a correlation of 0.90 exists between the two commodities
"The benefit is UP TO 75% OF THE TOTAL INITIAL MARGIN IN CASE OF SAME UNDERLYING COMMODITY, while it is UP TO 50% OF THE TOTAL INITIAL MARGIN IN CASE OF TWO DIFFERENT COMMODITIES such as a commodity complex."
"Regulations also require that such a spread margin in a commodity complex SHALL BE PROVIDED IF THERE EXISTS A CORRELATION OF 0.90 BETWEEN ANY TWO COMMODITIES."
Option (a)'s 75% is the figure for the same underlying commodity — a calendar spread — where the two legs are the same thing at different dates and therefore move together almost by construction. Two different commodities get half the benefit and must prove their relationship with a 0.90 correlation.
Two further conditions that are easy to overlook:
- ⚠️ "EXTREME LOSS MARGIN IS APPLICABLE INDIVIDUALLY TO BOTH THE LEGS of the positions" — so option (d) is wrong; the relief is on initial margin, not total
- ⚠️ "Such spread margin is permitted WHEN EACH INDIVIDUAL CONTRACT IN THE SPREAD IS FROM AMONGST THE FIRST SIX EXPIRING CONTRACTS"
The justification for any relief at all: "A spread position usually carries a lower margin than an outright position, as THE NET AMOUNT OF VALUE TO BE SETTLED TENDS TO BE LESS VOLATILE than an outright price." And the necessity: "spread trading results in VERY THIN PROFIT MARGIN in relation to outright trading" — thin profits are only viable on thin margins.
Where this is taught
Free preparation for NISM Series XVIRelated terms
- Buying a spreadAn intra-commodity spread trade — buying the near-month futures contract and simultaneously selling the far-month contract — taken when the near month looks underpriced or the far month overpriced relative to fair value.
- Inter-commodity spreadA long futures position in one commodity and a short position in a different but economically related commodity for the same month — such as guar seed against guar gum — to trade the gap between them.
- Intra-commodity spreadA long futures position in one contract month and a short position in another month (or a different lot size) of the same commodity, taken to profit from a change in the gap between them.
- Selling a spreadAn intra-commodity spread strategy that sells the near-month futures contract and buys the far-month contract at the same time, taken when the near month looks overpriced relative to the far month.
- Futures bull spreadAn intra-commodity futures spread taken when the actual gap between two calendar months is wider than the fundamental average difference — buy the near month, sell the far month, and wait for the gap to narrow.
- Futures bear spreadAn intra-commodity futures spread taken when the actual gap between two calendar months is narrower than the fundamental average difference — sell the near month, buy the far month, and wait for the gap to widen.