Wetin be put option for stocks?

Put option na contract wey give di owner right to sell 100 shares of one stock for one fixed price, wey dem dey call strike, any time before e expire. E be di mirror image of call option, wey be di right to buy. Put dey gain value as di stock dey fall and e dey lose value as di stock dey rise. You go pay premium upfront for dat right, and di most wey you fit lose as buyer na dat premium.

Di cleanest way to see how put dey behave na to follow one real contract through im life. Na dis one SPY put, di $740 strike wey dey expire June 18, 2026, wey dem trace from May 1 go reach im last clean session. Di chart plot SPY distance above or below dat $740 strike against di put price:

SELECT date,
       round(avg((underlying_close - 740) / 740 * 100), 2) AS spy_vs_strike_pct,
       round(avg(option_close), 2) AS put_price
FROM global_markets.options_greeks
WHERE ticker = 'O:SPY260618P00740000' AND date BETWEEN '2026-05-01' AND '2026-06-15' AND implied_volatility > 0.02
GROUP BY date ORDER BY date

Di put open di window for $23.05 on May 1 as SPY siddon below di $740 strike. As SPY climb above di strike through late May, di put drain go near couple of dollars, and by di final clean session e worth $1.16. Di two lines dey run opposite each other: every time di stock rise above di strike, di put sink, and every dip pull am back up. Dat inverse shape na di whole idea of put.

Wetin be put option, exactly?

Three numbers dey define every put: di strike (di price wey you fit sell), di expiration (di deadline), and di premium (wetin you pay for di contract). One contract cover 100 shares. Di SPY put wey dey above carry $740 strike and June 18 expiry. To own am mean say you hold di right to sell SPY for $740 per share through dat date, anywhere wey SPY dey trade.

Dat right dey worth di most when di stock siddon far below di strike, where you fit sell for $740 something wey di market price lower, and e dey close to nothing when di stock siddon far above am, where nobody go sell for $740 wetin dem fit sell higher for open market. Put na position on di downside: im value dey rise as di stock dey fall.

When put dey "in the money"?

Moneyness dey describe where di stock siddon relative to di strike. Put dey in the money when di stock dey trade below di strike, out of the money when di stock dey trade above am, and at the money right for di strike. For put, lower stock mean deeper in the money, di exact opposite of call.

Watch di same put for two moments wey be like one week apart, one near di top of SPY June range and one near im trough:

SELECT date,
       round(underlying_close, 2) AS spy_price,
       round(option_close, 2) AS put_price,
       round(greatest(740 - underlying_close, 0), 2) AS intrinsic_value,
       round(option_close - greatest(740 - underlying_close, 0), 2) AS time_value,
       round(delta, 3) AS delta
FROM global_markets.options_greeks
WHERE ticker = 'O:SPY260618P00740000' AND date IN ('2026-06-02', '2026-06-10')
ORDER BY date

On June 2, as SPY dey im $759.63 peak far above di $740 strike, di put dey deep out of the money and nearly worthless for $2.79. Eight sessions later SPY don fall go $722.88, well below di strike, and di very same contract jump go $18.7. Nothing about di put change. Na only di stock move, and di put move di other way.

Intrinsic value and time value

Put premium dey split into two parts. Intrinsic value na wetin di option worth if you exercise am right now: di strike minus di stock price, wey dem floor for zero. Time value na everything wey dey on top, wetin buyer dey pay for di chance say di stock go fall further before expiry.

On June 10, as SPY dey $722.88, di put intrinsic value na $17.12, di $740 strike minus di stock price. Di put trade for $18.7, and di extra $1.58 on top na pure time value. For di June 2 peak, di intrinsic value na $0: di stock siddon above di strike, and di entire $2.79 premium na time value wey dey ride on out-of-the-money bet. As expiration dey near, time value dey drain go zero, and out-of-the-money put wey no get intrinsic value left go expire worthless.

Put delta dey negative

Delta dey measure how much di option price dey move for $1 move for di stock. For call, delta dey positive. For put, delta dey negative: di put dey rise when di stock dey fall. Option delta still dey track roughly how deep in the money di contract dey, e dey run from near 0 for far out-of-the-money put go toward -1 for deep in-the-money one.

SELECT date,
       round(avg(delta), 3) AS delta
FROM global_markets.options_greeks
WHERE ticker = 'O:SPY260618P00740000' AND date BETWEEN '2026-05-01' AND '2026-06-15' AND implied_volatility > 0.02
GROUP BY date ORDER BY date

Di put open di window with delta of -0.681 and e steepen go -0.796 on June 10 as SPY drop below di strike. Delta wey dey near -0.8 mean say di put move about 80 cents for every dollar wey SPY fall. As di option push deeper in the money, im delta head toward -1; as SPY rally back above di strike into expiry, delta drift back toward zero and di put price follow am down. Di line never cross above zero: put delta dey negative for im entire life.

Why traders dey buy puts

Put get two everyday uses. Di first one na downside protection. Investor wey get shares dey buy put as insurance: if di stock drop, di put gain go offset di loss on di shares, and di premium na di flat cost of dat coverage. Dis pairing dem often dey call protective put. Di second one na bearish position. Trader wey no get shares dey buy put to profit from decline, e dey risk only di premium instead of di open-ended loss of shorting di stock outright. Either way, di arithmetic na di one wey di trace above draw: di put dey pay when di stock fall.

Di other forces wey dey move put price, time and volatility, na di option greeks, and di volatility piece na implied volatility. Di strike and di calendar together fix when di option expire and how fast im time value dey drain. Push di expiry all di way go inside single session and you go get di fast, all-or-nothing behavior of 0DTE options.

FAQ

Wetin be put option for simple terms?

Put na di right to sell 100 shares of one stock for one set price before one set date. You dey pay premium for am, and e dey gain value as di stock dey fall. E be di opposite of call, wey be di right to buy.

You gats own di stock before you fit buy put?

No. Trader wey no get shares fit buy put purely as bearish position, e dey risk only di premium. Investor wey get di shares fit buy put as insurance against drop, one setup wey dem dey call protective put.

Wetin dey happen to put if di stock go up?

Di put dey lose value. When di stock dey trade above di strike, di put dey out of the money and e hold only time value, wey dey drain go zero as expiry dey near. Di SPY put wey dey above fall go $1.16 once SPY don rally back above im $740 strike.

How much you fit lose if you buy put?

As di buyer, di most wey you fit lose na di premium wey you pay. Dat amount dey fixed di moment wey you buy di contract, no matter how far di stock rise against you.

Trace dis SPY put through delta, time value, and implied volatility by yourself for Strasmore terminal.