Understanding Option Writing

The person who creates and sells the contract is the option writer — you are the writer whenever you sell an option you did not already own. Working through a brokerage firm regulated by the SEC and FINRA, the writer sets the contract’s terms: the fixed “strike price” at which the asset changes hands if the buyer chooses to exercise, and the expiration. In exchange for taking on the obligation to fulfill the contract if called upon, the writer receives the “option premium”.

Option Writer

Initiates the contract, receives the premium, remains responsible for fulfilling the contract. Profit typically earned by the option writer through the premium, especially if the option is not exercised.

Option Holder

Owns the contract, has the right (but not the obligation) to exercise it if it becomes advantageous or can sell.

For example, suppose you sell (“write”) a call option on 100 shares of Apple stock with a strike price of $200, expiring in three months. You collect a premium—let’s say $5 per share, or $500 total. If Apple’s stock price rises above $200, the buyer may exercise the option, and you’re obligated to sell your shares at $200, even if the market price is higher. If the price stays below $200, the option expires worthless, and you keep the premium.

Now run the same contract from the buyer’s side, because this is the canonical first trade. You paid $500 for the right to buy 100 shares at $200. At expiration with Apple at $190, the right to pay $200 for a $190 stock is worth nothing — you lose the $500, all of it. At $205, the option is worth $\$5\times 100=\$500$ — you break even (before commissions). At $220 it is worth $\$20\times 100=\$2,000$, a $1,500 profit on $500 risked, while the same $500 in stock would have earned $50. That asymmetry — total loss below the strike, levered gain above it — is the whole product; every strategy in this chapter is some arrangement of it.

One piece of market shorthand, used constantly from here on: you are long an option you bought and short an option you wrote. Closing a short position means buying back an identical contract; closing a long means selling it.

Understand who is actually on the other side of your contract, because the retail description of this is wrong. You are not linked to a named counterparty. The moment a listed option trade clears, the Options Clearing Corporation (OCC) interposes itself as buyer to every seller and seller to every buyer — novation — and from then on the OCC is your counterparty. (Every use of “OCC” in this chapter means the clearing house; the bank regulator with the same initials is the Office of the Comptroller of the Currency, which has nothing to do with options.) That is what makes an exchange-traded option fungible: you can close a short position at any time by buying an identical contract, and you are then completely out, with no residual obligation to anyone.

Assignment does not follow the paper trail back to whoever originally wrote the contract. When a holder exercises, the OCC assigns the exercise at random among clearing members carrying short positions in that series; the clearing member then allocates to one of its own customers by random selection or first-in-first-out, whichever method it has disclosed. The practical consequences are worth internalizing: a short option can be assigned at any time (for American-style contracts), assignment is unrelated to how long you have held the position, and no amount of being early or late in the queue helps you. The mechanics are set out in the OCC By-Laws and in Characteristics and Risks of Standardized Options, the disclosure document your broker was required to give you before approving the account.

Kill one piece of folklore before it costs you money. You will hear that “90% of options expire worthless,” usually from someone selling you an option-writing course. It is a misreading of the statistic that only about 10% of contracts are exercised. The rest do not evaporate — OCC volume data shows roughly 55–60% of open contracts are closed out before expiration, leaving only about 30% that actually expire worthless. Writers do not collect a near-certain premium, and buyers are not near-certain losers; most participants on both sides trade out of the position long before expiration decides anything.

What Options Are Actually For The retail framing is that options are a leveraged casino for directional bets — buy a call, hope the stock rips, sell the call to someone greedier than you. That framing is fine for an options-discount-broker advertisement and useless for anyone managing real capital. For a serious portfolio, options serve three valid purposes, none of which involve guessing next month’s price.

Trading volatility, not direction

Implied volatility is the only input to an option price that the market actually disagrees about; everything else (spot, strike, time, rate) is observable. When implied volatility (the volatility back-solved from the option’s market price — what the market is charging for) is rich relative to realized volatility (the movement the stock actually delivers), you are selling expensive insurance; when it is cheap, you are buying it on sale. The trade is between two distributions, not two spot prices.

Engineering structural hedges on positions you cannot, or will not, sell

A concentrated single-stock RSU position, a pre-IPO holding under lockup, a long-held founder stake with a near-zero cost basis — selling triggers an immediate tax event, often at the highest marginal rate stacked with state and NIIT. A protective collar, a systematic rolling put program, or a variable-prepaid forward immunizes the balance sheet against drawdowns without crystallizing the gain. See section “Asymmetric Tail Hedging for Concentrated Equity”.

Engineering payoff shapes that the cash market cannot produce

Convex tail-hedge programs, asymmetric upside on capped capital at risk, premium income against a stock you were prepared to buy anyway — these are payoff shapes you cannot replicate with cash equities and cash bonds. That is what options are for.

A note on the underlying mathematics, because it matters for almost everything that follows. Black-Scholes and most of the models you will see in a textbook assume asset returns are log-normal — a thin-tailed Gaussian distribution where seven-sigma days are impossible. Real return distributions are nothing of the sort. Equity returns are fat-tailed, with kurtosis several times higher than normal, and the tails are asymmetric — left tails are fatter than right tails.⁹¹ Empirical work by Bouchaud and others has documented this exhaustively across decades and markets.¹³⁴ The market knows this: implied volatility is structurally higher for out-of-the-money puts than for at-the-money calls on the same underlying, the well-known volatility smile (or, more accurately, the volatility skew). What this means in practice: the model price is wrong, the market price is closer to right, and anyone selling out-of-the-money puts to “collect premium” is not collecting free money — they are being paid a fair-ish price to absorb a tail the model told them did not exist.