Calls and Puts

Every options question on the SIE starts with one fundamental distinction: is it a call or a put? Master this, and the rest of options falls into place.

What Is an Option?

• An option is a contract that gives one party the right (but not the obligation) to buy or sell a security at a specific price within a specific time
• Two parties to every option contract: the buyer (holder) and the seller (writer)
• The buyer pays a premium to the seller for the contract
• Options are derivatives: their value is derived from an underlying security

Call Options

A call option gives the holder the right to BUY the underlying security at the strike price.

• Call buyer (holder): Pays the premium, profits when the price goes UP
• Call seller (writer): Receives the premium, is obligated to sell if assigned
• Bullish position: you buy a call when you think the stock will rise

Think of it this way: A call is like a reservation to buy. You lock in a purchase price, and if the market goes higher, you benefit.

Put Options

A put option gives the holder the right to SELL the underlying security at the strike price.

• Put buyer (holder): Pays the premium, profits when the price goes DOWN
• Put seller (writer): Receives the premium, is obligated to buy if assigned
• Bearish position: you buy a put when you think the stock will fall

Think of it this way: A put is like insurance on your stock. If the price drops, you can still sell at the strike price.

The Four Basic Positions

Think of it this way: A stock's price can fall to $0, but never below. That floor is why a put's max gain (buyer) and max loss (writer) are both capped at strike price minus premium, not unlimited. If the stock drops from $50 to $30, the put writer's loss at that price is smaller than the maximum; the true worst case is the stock at $0, where the writer must buy worthless shares at the strike price.

Exam Tip: Gotchas

• A long put and a short call are both bearish, but they are not the same. A long put gives the right to sell (limited risk); a short call creates the obligation to sell (potentially unlimited risk). Same directional outlook, very different risk profiles.
• "Long" always means buyer; "short" always means seller, regardless of whether it is a call or a put.
• Max loss on a short put assumes the stock goes to $0, not just any decline. A partial drop produces a smaller loss than the maximum.
• "Short" has two different meanings, and options mix them together. Shorting a stock is an action: you borrow shares, sell them, and hope to buy them back later at a lower price. Being "short" a call or a put is a label for a position: it means you wrote (sold) that option and collected the premium, not that you borrowed anything. Same word, two different mechanics.

Opening and Closing Transactions

Every option trade either opens a position or closes one. "Purchase" or "sale" tells you the direction of the trade; "opening" or "closing" tells you whether it starts a position or ends one.

• An option position ends in one of three ways: exercise (for the writer, assignment), expiration, or a closing transaction before expiration
• A closing transaction must be in an identical option: same underlying, type, strike price, and expiration
• Holders often close with a closing sale instead of exercising, because a sale also captures any time value the option still has
• A writer can close with a closing purchase only before being assigned; once an exercise is assigned to the writer, the writer must perform

Exam Tip: Gotchas

• A writer who "covers" by buying the option back makes a closing purchase. The writer is not opening a new long position; the purchase cancels out the short one.
• A holder who sells an option they own makes a closing sale, not an opening sale. Writing an option you do not own is the opening sale.

The Buyer/Seller Divide

This is the single most important concept in options:

Exam Tip: Gotchas

• Buyers have rights, sellers have obligations. This distinction drives every options question on the SIE. The buyer pays the premium for the right to act; the seller receives the premium and must perform if assigned, unless it closes the position with a closing purchase first.

What Should You Check on Exam Day?

• Can you explain why buyers have rights while sellers have obligations in an option contract?
• Do you know why a long put and a short call are both bearish but carry different risk levels?
• Can you state the max gain and max loss for each of the four basic option positions, including why a short put's max loss assumes the stock falls all the way to $0?
• Can you name the four opening and closing transactions, and which one a writer uses to buy back a short option?
• Can you explain what "long" and "short" mean, regardless of whether the option is a call or a put?