Buying and Selling Call Options

A call option is the right to buy 100 shares of a stock at a fixed price (the strike) before a set date. Buying a call means paying a premium up front for that right. Selling a call to close means handing the contract back to the market for whatever it is worth on any trading day before expiry. What follows is the full round trip of one real long call, from entry to exit, in stored prices.

The contract is a SPY $740 call expiring June 18, 2026. On May 1 it cost $7.22 per share. One contract controls 100 shares, so opening it cost about $722. That $722 is the entire risk on the trade. If SPY finishes below the $740 strike at expiry, the call expires worthless and the buyer is out the premium and nothing more. No move in the stock can cost a call buyer more than what they paid to open the position.

What you pay, and what you can make

Your breakeven at expiry is the strike plus the premium: $740 + $7.22 = $747.22. Below $747.22 on expiration day the position is net negative; above it the call pays a dollar for every dollar SPY clears the strike, with no ceiling on the upside. The premium is the floor under the loss and the toll on every gain.

Here is what this one contract actually did across its seven-week life:

SELECT date,
       round(avg(option_close), 2) AS call_price
FROM global_markets.options_greeks
WHERE ticker = 'O:SPY260618C00740000' AND date BETWEEN '2026-05-01' AND '2026-06-15' AND implied_volatility > 0.02
GROUP BY date ORDER BY date

The call opened at $7.22 and closed its last clean session at $15.41. The path between was anything but a straight line, and where a buyer chose to sell decided everything.

The winning exit and the crush

Watch the same contract at four moments: the entry, its peak, its low, and a late rally.

WITH entry AS (
  SELECT option_close AS premium
  FROM global_markets.options_greeks
  WHERE ticker = 'O:SPY260618C00740000' AND date = '2026-05-01' AND implied_volatility > 0.02
)
SELECT multiIf(g.date = '2026-05-01', 'Entry (May 1)',
               g.date = '2026-06-02', 'Peak (Jun 2)',
               g.date = '2026-06-10', 'Trough (Jun 10)', 'Rally (Jun 15)') AS stage,
       round(g.underlying_close, 2) AS spy_price,
       round(g.option_close, 2) AS call_price,
       round(g.option_close / e.premium, 2) AS x_entry,
       round((g.option_close - e.premium) * 100, 0) AS pnl_per_contract
FROM global_markets.options_greeks g, entry e
WHERE g.ticker = 'O:SPY260618C00740000'
  AND g.date IN ('2026-05-01', '2026-06-02', '2026-06-10', '2026-06-15')
  AND g.implied_volatility > 0.02
ORDER BY g.date

At the June 2 peak the call was worth $23.5, about 3.25 times the premium, a gain of roughly $1628 on a single contract. A buyer who sold to close that morning banked it. A buyer who held watched SPY slide to $722.88 over the next week, and the call cratered to $3.17 by June 10, only 0.44 times what they paid. That is the crush: a call loses value fast when the stock falls or the calendar runs down, and in early June both pressed at once. The contract then rallied back to $15.41 by June 15, a gain of about $819, still short of the peak.

Selling to close versus holding to expiry

Selling to close realizes whatever the option is worth that instant, gain or loss, and ends the trade. Holding to expiry bets on where SPY lands on the final day, and every day of waiting, time decay grinds a little more out of the premium: see option theta, and when options expire for how the clock is set. The peak and the trough sat nine trading sessions apart. Same contract, same buyer, opposite outcomes, separated only by the exit.

Why the call moved far more than SPY

Index the stock and the option to their May 1 values and they tell different stories:

SELECT date,
       round(spy / first_value(spy) OVER w * 100, 1) AS spy_index,
       round(opt / first_value(opt) OVER w * 100, 1) AS call_index
FROM (
  SELECT date, avg(underlying_close) AS spy, avg(option_close) AS opt
  FROM global_markets.options_greeks
  WHERE ticker = 'O:SPY260618C00740000' AND date BETWEEN '2026-05-01' AND '2026-06-15' AND implied_volatility > 0.02
  GROUP BY date
)
WINDOW w AS (ORDER BY date)
ORDER BY date

SPY finished the window near 104.7 on that scale, about five points above its start. The call, indexed the same way, more than tripled at the peak and fell below half its starting value at the trough, closing near 213.4. That amplification is leverage: one contract commands 100 shares for a fraction of their cost, so a small percentage move in the stock becomes a large percentage move in the option. Once SPY pushed well above the strike, the call began tracking it almost one-for-one, its delta climbing toward 1. The full mechanics of that sensitivity are the option greeks, and the volatility spike visible in early June is implied volatility repricing the entire option chain.

FAQ

What does it cost to buy a call option?

You pay the premium, quoted per share, times 100 shares per contract. This SPY $740 call cost $7.22 per share on May 1, or about $722 for one contract. That premium is the most a call buyer can lose.

Can you sell a call option before it expires?

Yes. Most call buyers sell to close on the open market rather than exercising the option. You can exit on any trading day the contract is open, capturing its current value. At this call's June 2 peak that value was $23.5, versus the $7.22 entry.

What is the most you can lose buying a call?

The premium, and only the premium. Buying a call carries a fixed, known maximum loss equal to what you paid to open it. If the stock never clears the strike plus the premium, the call expires worthless and that premium is the full loss.

Why do call options lose value when the stock drops?

A call gains when the stock rises and loses when it falls, amplified by leverage. This call fell from $23.5 to $3.17 over nine sessions as SPY dropped and the calendar ran down together. Falling stock and passing time both drain a long call.

Every price above is a stored query you can rerun on the Strasmore terminal.