What is an option?

Start with something you already know

Imagine a new phone is launching in three months. Nobody knows the launch price yet — rumours say anywhere from ₹75,000 to ₹95,000.

A shop makes you an offer:

Pay us a ₹2,000 token today (non-refundable) and we'll let you buy the phone at ₹80,000 on launch day — if you want to.

You pay the token. Three months later, one of two things happens:

That token deal is an option. You paid a small amount for the right, but not the obligation, to buy something at a fixed price on a fixed date.

The same deal, in market words

Every piece of the phone deal has a proper name in options trading:

So a NIFTY 22400 CE is a contract that says: "the buyer can buy NIFTY at 22,400 on expiry day." If NIFTY ends at 22,700, that right is worth 300 points. If NIFTY ends at 22,100, the right is worthless — nobody wants to buy at 22,400 what they can get for 22,100.

Two sides of every option

The shop in our story is the option seller (also called the writer). It is the other half of every trade:

Why would anyone sell? Because most of the time, the price does not move enough for the buyer to profit — and the seller keeps the premium. Buyers win big sometimes; sellers win small more often. We'll see exactly how in the next lessons.

Calls and puts

There are only two kinds of options:

• A call (CE) is the right to buy. Call buyers want the price to go up.
• A put (PE) is the right to sell. Put buyers want the price to go down. A put works like insurance — more on that in the put lesson.

Combine "buy or sell" with "call or put" and you get the four basic positions. Every option strategy you'll ever see is built from these four blocks.

Why do traders use options?

1. Small money, big exposure. One NIFTY lot is 65 units. Buying NIFTY itself at 22,400 means controlling ₹14.56 lakh of index. Buying one lot of the 22400 call at ₹175 costs just ₹11,375 (175 × 65) — yet it gains if NIFTY rises just like the index does above the strike.

2. Known maximum loss. As a buyer, the worst case is fixed the moment you buy: the premium.

3. Flexibility. You can profit from rises, falls, a market going nowhere, or even a big move in either direction — which simply isn't possible by buying or selling shares alone.

Quick recap

1. 1

   An option is a contract

   It gives the buyer a right to buy (call) or sell (put) the underlying at the strike price, until expiry.

2. 2

   The buyer pays a premium

   That premium is the most a buyer can lose. The seller keeps it if the option expires worthless.

3. 3

   Four building blocks

   Buy call, sell call, buy put, sell put. Everything else is a combination of these.