Get paid to wait for stocks you want to buy at a lower price. This chapter goes deep: strike selection scoring, ladder construction, assignment mechanics, the complete wheel framework, and how Indian physical delivery reshapes the strategy.
📖 17 min read🇮🇳 TCS / HDFC / Reliance
The idea
You want to buy a stock but only at a discount. Two ways to wait:
Set a buy limit order at your target → you buy nothing and earn nothing while waiting
Sell a cash-secured put at your target → get paid ₹X today; if the stock hits your price you’re forced to buy it; if not, you keep the premium
Option 2 pays you to be patient. That’s the cash-secured put.
Cash-secured put — hover to see P&L at any TCS priceProfitLoss
At Spot (3,700)
+₹22
Strikes
3,650
Above the short strike, you keep the full premium. Below, your P&L behaves like owning the stock at (strike − premium) — the discount you get from being paid to wait.
What would this have done on real Nifty?
Why “cash-secured”?
You must have enough cash in your account to actually buy the underlying if assigned. If you sell a TCS 3,700 put on 1 lot (175 shares), you need ₹3,700 × 175 = ₹6,47,500 in cash as collateral.
Naked put = selling the put WITHOUT cash reserved. Much riskier (margin call risk). Not what we’re teaching here.
A detailed worked example
Example
TCS cash-secured put — complete numbers
TCS at ₹3,800. You’d love to own it at ₹3,700.
Setup:
Sell 1 TCS 3,700 PUT (monthly, 30 days out) at ₹50 premium
Cash reserved as collateral: 3,700 × 175 = ₹6,47,500
Premium collected today: 50 × 175 = ₹8,750
TCS 3,700 short put — hover to see P&L at any expiry priceProfitLoss
At Spot (3,800)
+₹8,750
Strikes
3,700
Above ₹3,700: keep the full ₹8,750 (flat green line). Below ₹3,700: assigned into stock; your effective cost becomes ₹3,650/share. Losses grow linearly with TCS falling.
Return calculations:
Formula
Return if unchanged/OTM = Premium collected ÷ Collateral
= 8,750 ÷ 6,47,500 = 1.35% for the month (~17% annualized if repeatable)
Effective purchase price if assigned = Strike − (Premium ÷ Lot size)
= 3,700 − 50 = ₹3,650 per share
Assignment probability at 2.6% OTM strike ≈ 25-35% typically
Selecting the right strike
Just like covered calls, the strike choice reflects your view.
Strike vs spot
Premium
Assignment probability
Best when
ATM (at spot)
Highest
~50%
You want the stock now; maximize premium
1-2% OTM
High
~35-45%
Aggressive — want the stock soon, big premium
3-5% OTM ← common sweet spot
Moderate
~20-30%
Patient — happy at meaningful discount
5-8% OTM
Lower
~10-20%
Very patient — want stock only on real dip
10%+ OTM
Very low
~5% or less
Pure income, rarely assigned
AdvancedAn expert cash-secured put ranking system
Same idea as covered call ranking, applied to puts.
Step 1: Compute two returns
Formula
Return-if-unchanged (RIU) = Premium ÷ (Strike × Lot size)
Return-if-assigned (RIA) = What you effectively “made” if assigned at expiry
= Premium ÷ (Strike − Premium/Lot × Lot size)
≈ Premium ÷ Effective purchase cost
Note: RIA is a bit conceptually weird — you don’t literally “profit” at assignment; you’re now long stock. It represents the “yield” you got in exchange for the assignment discount.
Step 2: Rank candidates
Three TCS put candidates (TCS at 3,800):
Strike
OTM%
Premium
RIU (mo)
Assignment Prob
3,750 (1.3% OTM)
1.3%
₹85
1.30%
~40%
3,700 (2.6% OTM)
2.6%
₹50
0.77%
~30%
3,650 (3.9% OTM)
3.9%
₹35
0.55%
~20%
3,600 (5.3% OTM)
5.3%
₹22
0.34%
~12%
An expert principle:
If you WANT the stock: pick higher assignment probability (3,750 strike) — you get paid to buy it soon
If you’re INDIFFERENT / mostly want income: pick lower assignment probability (3,600 strike) — smaller premium, more likely to keep repeating
The 3,700 strike (middle) is the balanced pick most retail traders converge on.
Step 3: Apply the “would I own this stock?” filter
Before selling ANY cash-secured put, ask:
Would I hold this stock for 6-12 months if assigned?
Is my collateral fully committed to this position (no need elsewhere)?
Is the strike price genuinely attractive as an entry price?
If any answer is no, don’t sell the put. Selling puts on stocks you don’t want is a recipe for getting stuck holding losers.
The put ladder — spreading across strikes
Instead of one put at one strike, layer multiple puts at different strikes for a smoother entry curve.
Example
TCS put ladder — three strikes
TCS at ₹3,800. You want to accumulate a full position if it drops.
The next Monday: if assigned, sell covered calls on the new shares
Assigned — now what?
You now own 175 shares of TCS at ₹3,650 effective. TCS is at ₹3,620.
Options:
Sell covered call at 3,700-3,750 strike, next month. Continue Wheel cycle.
Hold and wait for TCS to recover before writing calls (if premium is too low right now).
Sell if the thesis broke — cash out, redeploy elsewhere.
Realistic Wheel returns
Market regime
Annualized return
Notes
Bull (Nifty up 15-25%/yr)
10-15%
Underperform market — you get called away early
Range-bound / slow trend
12-18%
Sweet spot — collect premium repeatedly
Mild correction (−5 to −15%)
3-8%
Absorb the drop via lower cost basis
Sharp bear market (−20%+)
−10 to −20%
Underperform less than raw stock hold
Long-run average across cycles: ~10-15% CAGR on the working capital. Not a get-rich strategy but a reliable one for patient investors.
When the Wheel breaks
If a stock drops 30-40% while you’re wheeling it:
You’re stuck with shares deeply underwater
Covered call premium is meager (deep OTM strikes)
Original thesis may be broken
Rule: if a wheeled stock drops 25%+ from your first assignment price, exit the position entirely and redeploy capital. Don’t keep writing worthless calls hoping for recovery.
Common Wheel mistakes
Wheeling stocks you wouldn’t hold — get stuck with junk
Too much concentration — Wheel on 1 stock = single-name risk
Chasing high-premium strikes — assignment happens faster than expected
Ignoring earnings — assignment on earnings drops is common
Rolling puts for debit — never do this
Follow-up action for cash-secured puts
AdvancedAdjustment recipes for cash-secured puts
Scenario 1: Put is going ITM, don’t want assignment
Symptom: Stock has dropped through your strike; put is now ITM by 1-3%.
Action A — Roll down and out for credit.
Buy back current put at loss
Sell a further-OTM put with more time (next month)
Must be net credit
Strike is lower (accept if assigned) and time is longer
Action B — Accept assignment.
If you’d own the stock at this price anyway, let assignment happen
Start writing covered calls next Monday
This IS the Wheel working
Action C — Buy back and close, do nothing further.
Take the option loss
Wait; sell a fresh put next month at a different strike or don’t
Best when: your fundamental view on the stock has changed
Scenario 2: Put is near-worthless with time left
Symptom: 15 days left; put worth ₹5 vs. original ₹50; stock rallied away.
Action: Buy back for near-full profit.
Pay ₹875 to close (₹5 × 175)
Keep ₹7,875 realized
Redeploy capital in next month’s put at a fresh strike
The “close early” rule: when put value drops to under 25% of premium collected, close and redeploy. Time value is squeezing, gamma risk is rising, better opportunities await.
Scenario 3: Approaching expiry with put ATM
Symptom: 3 days left; stock at strike; put worth ~₹15.
Action A — Close for near-max profit.
Pay ₹15 to close (~30% of original ₹50)
Skip pin risk on expiry morning
Redeploy immediately
Action B — Hold to expiry.
Save closing cost
Accept pin risk (small if strike is round number)
For most retail traders, closing early is safer.
Scenario 4: Earnings during position life
Symptom: You sold a put; earnings are announced for 2 days from now.
Action A — Close before earnings.
Lock in current time decay
Avoid IV crush + gap risk
Redeploy after earnings
Action B — Hold through earnings.
If IV was already elevated at entry, IV crush helps
Directional risk is on you
Retail default: close before earnings on individual stocks. Only hold if the position is already deep OTM and safe.
When cash-secured puts fail
Not a golden goose. Fails in these situations:
Sharp market crash — assignment at high prices, then further declines
Fundamentally broken stock — you get assigned into a losing position
Concentrated bets — Wheeling only 1 stock exposes you to single-name risk
Ignoring earnings/events — big gap moves during position life
The core skill isn’t the strategy — it’s stock selection. A good CSP on a bad stock is still a bad trade.
Indian market specifics
Physical delivery
If assigned, you receive actual shares in your demat. Delivery mechanics:
Broker debits cash for full ₹6,47,500 (for TCS 3,700 example)
Shares credited to demat next trading day
STT on exercised option: 0.125% × underlying value = ₹809 on this trade (much higher than regular option STT)
Delivery brokerage: ~₹20
Weekly puts?
Nifty and Sensex have weekly puts — you can Wheel indices too
Individual stocks: monthly only — no weekly stock options in India
Bank Nifty, Finnifty: monthly only after 2024 consolidation
Corporate actions
Regular dividends: put strike NOT adjusted (dividend drop is priced in normally)
Special dividends (>5%): strike adjusted downward — could turn OTM put into ITM
Splits/bonuses: proportional adjustment to strike and lot
Always check upcoming corporate actions before selling stock puts. Some brokers show them; NSE circulars are the primary source.
The put credit spread — defined-risk alternative
If you don’t want to tie up ₹6.5L in collateral, use a bull put spread:
Collateral required: ~₹35,000 (much less than ₹6.5L)
Trade-off: less premium, bounded loss, much less capital tied up.
For traders with less capital, put credit spreads are strictly better risk-adjusted than cash-secured puts. See Chapters 10/11 for spreads in depth.
Full pre-trade checklist
Before selling any cash-secured put:
Would I genuinely hold this stock long-term if assigned?
Do I have full collateral in cash?
Have I computed RIU and set expectations?
Am I inside acceptable OTM range (2-5% typically)?
Are there any corporate actions in the position window?
Is earnings in the position window? If yes, sized down?
Do I have an adjustment plan if put goes ITM?
Is this within my per-position size limit?
Summary
Cash-secured put = sell put on stock you want, keep premium if OTM, buy stock at target price if ITM
Best strike: 3-5% OTM for balanced income + assignment probability
Wheel strategy = CSP → assignment → CC → called away → repeat
Realistic long-run yield: 10-15% CAGR on working capital
Never sell puts on stocks you wouldn’t hold
India specifics: physical delivery, ₹0.125% STT on assignment, monthly-only for stocks
The cash-secured put is the “buy dips at your prices” strategy. Combined with covered calls (the Wheel), it’s the workhorse retail income framework in India.