Straddle Seller

The Straddle Seller shows the margin needed to sell each NIFTY call and put strike, using NSE's SPAN file, on one option chain. Sell a strike, then pick a hedge further out to see how the margin, the premium you keep and the credit on margin change.

Shows	Sell margin per strike, margin with a hedge, premium received, credit on margin, Q-Lift
Layout	Summary strip and small payoff on top; chain below with call margin, price, strike, price, put margin
Pricing	NSE SPAN file plus exposure margin; option prices at live LTP
Instruments	NIFTY, next five expiries
Updates	Re-checked every 5 seconds while the page is visible; SPAN file checked every 5 minutes
Open it	quintalmind.com/screener/straddle-seller

What you see

The chain. Each row is a strike, with columns Call margin, Price, Strike, Price, Put margin. Each margin cell also shows how far the strike is from spot (ATM, OTM 2, ITM 1 and so on, counted in strikes).

After you sell. Click a margin to sell that strike. Strikes further out on the same side then become possible hedges. Each shows the margin with that hedge bought and its Q-Lift (for example 1.20x). On a side you have not sold yet, a cell shows the extra margin selling it would add. You choose hedges yourself, one side at a time; nothing is picked for you. A soft tint marks up to three hedges per side close to the highest credit on margin, and only where Q-Lift is above 1. It is a reading aid, not a recommendation.

Summary strip.

• Margin required for your lots, and how much less it is than without the hedge.
• Lots stepper.
• You receive: premium from the sold legs minus the hedge cost.
• On margin: what you receive as a percentage of the margin.
• Q-Lift: credit on margin after the hedge ÷ credit on margin before it.
• Hedge cost.

How the margin is worked out

The margin follows the method NSE and brokers use for options:

1. SPAN margin. NSE's SPAN file lists the loss each contract would take in a set of price and volatility scenarios. The worst combined loss for your legs is taken, the net value of the options is subtracted, and the result never goes below zero.
2. Exposure margin. NSE's percentage for each contract × spot × lot size. It applies to sold legs only.
3. Total margin = SPAN + exposure − the net premium you receive at live prices.

Because the hedge reduces the worst-case loss, a bought leg further out lowers SPAN. That is why a hedge can raise the credit on margin even though it costs premium.

Outside market hours the page uses last prices. NSE's newest file may then be the next session's file, which has one day less to expiry, so figures can differ slightly from the last close.

How to use it

1. Sign in with your broker and open Sheets, then switch to Screener (or go to /screener/straddle-seller).
2. Choose an expiry at the top.
3. Click a call margin, a put margin, or both, to sell those strikes.
4. Click a strike further out on a sold side to add it as a hedge, and compare the summary.
5. Set Lots.

Broker basket

If you signed in with Zerodha, Alice Blue or FYERS, Buy and Sell buttons open the legs as a basket on your broker's own page. Quintal Mind does not place the order.

Related

• Straddle chart: the live NIFTY ATM straddle.
• Payoff terminal: build any strategy and see its payoff.
• Option chain: the full live chain.

FAQ

How much margin is needed to sell a NIFTY option at each strike?

Quintal Mind's Straddle Seller shows the margin to sell every NIFTY call and put strike on one chain, worked out from NSE's SPAN file and live prices.

How much margin does a hedge save on a short NIFTY option?

After you sell a strike, each strike further out on that side shows the margin with that hedge bought. The summary shows the new margin, the hedge cost and how much less margin is needed.

What is Q-Lift?

Q-Lift is credit on margin after the hedge divided by credit on margin before it. Above 1x, the hedged position collects more premium per rupee of margin than the unhedged one.

Where do the margin numbers come from?

From NSE's published SPAN risk file, checked for a new version every 5 minutes, plus the exposure margin percentage NSE sets for each contract. No broker margin call is made.