23.06.2019
AAKASHAYA PATRA SEVEN STAR SMART EDUCATION SERIES PART – 13
:
INTRODUCTION TO OPTIONS
An option is
a contract written by a seller that conveys to the buyer the right — but not
the obligation — to buy (in the case of a
call option) or to sell (in the case of a put option) a particular asset, at a particular price (Strike
price / Exercise price) in future. In return for granting the option, the seller collects a
payment (the premium) from the buyer. Exchange- traded options form an important class of options
which have standardized contract features
and trade on public exchanges, facilitating trading among large number of
investors. They provide settlement
guarantee by the Clearing Corporation thereby reducing counterparty risk. Options can be used for hedging, taking
a view on the future direction of the market,
for arbitrage or for implementing strategies which can help in
generating income for investors under
various market conditions.
OPTION
TERMINOLOGY
·
Index options: These options
have the index as the underlying. In India, they have a European style settlement. Eg. Nifty options,
Mini Nifty options etc.
·
Stock options: Stock options are
options on individual stocks. A stock option contract gives the holder the right to buy or sell the underlying
shares at the specified price. They have an
American style settlement.
·
Buyer of an option: The buyer of an option
is the one who by paying the option premium
buys the right but not the obligation to exercise his option on the seller/writer.
·
Writer / seller of an option: The writer / seller
of a call/put option is the one who receives
the option premium and is thereby obliged to sell/buy the asset if the
buyer exercises on him.
·
Call option: A call option gives the holder the
right but not the obligation to buy an asset by
a certain date for a certain price.
·
Put option: A put option gives the holder the
right but not the obligation to sell an asset by a certain date for a certain price.
·
Option price/premium: Option price is the
price which the option buyer pays to the option seller. It is also referred to as the option
premium.
·
Expiration date: The date specified
in the options contract is known as the expiration date, the exercise date, the strike date or
the maturity.
·
Strike price: The price specified in the options
contract is known as the strike price or the
exercise price.
·
American options: American options
are options that can be exercised at any time upto the expiration date.
·
European options: European options
are options that can be exercised only on the
expiration date itself.
·
n-the-money option: An in-the-money
(ITM) option is an option that would lead to a
positive cashflow to the holder if it were exercised immediately. A call
option on the index is said to be in-the-money
when the current index stands at a level higher than the strike price (i.e. spot price > strike price). If
the index is much higher than the strike price, the call is said to be deep ITM. In the case of a
put, the put is ITM if the index is below the
strike price.
·
At-the-money option: An at-the-money (ATM)
option is an option that would lead to zero
cashflow if it were exercised immediately. An option on the index is at-the-money
when the current index equals the strike
price (i.e. spot price = strike price).
·
Out-of-the-money option: An out-of-the-money
(OTM) option is an option that would lead
to a negative cashflow if it were exercised immediately. A call option on the
index is out-of-the-money when the current
index stands at a level which is less than the strike price (i.e. spot price < strike price). If
the index is much lower than the strike price, the call is said to be deep OTM. In the case of a put,
the put is OTM if the index is above the
strike price.
·
Intrinsic value of an option: The option
premium can be broken down into two components
- intrinsic value and time value. The intrinsic value of a call is the
amount the option is ITM, if it is ITM. If
the call is OTM, its intrinsic value is zero. Putting it
another way, the intrinsic value of a call
is Max[0, (St — K)] which means the intrinsic value of a call is the greater of 0 or (St
— K). Similarly, the intrinsic value of a put is Max[0, K — St],i.e. the greater
of 0 or (K — St). K is the strike price and
St is the spot price.
·
Time value of an option: The time value of
an option is the difference between its
premium and its intrinsic value. Both calls and puts have time value. An
option that is OTM or ATM has only time value.
Usually, the maximum time value exists when the option is ATM. The longer the time to expiration, the greater
is an option's time value, all else equal.
At expiration, an option should have no time value.
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