Optionality

An option gives the right to buy ('call') or sell ('put') shares at a fixed 'strike' price, but only before an agreed date when the option expires.

An option gives the right to buy ('call') or sell ('put') shares at a fixed 'strike' price, but only before an agreed date when the option expires. The person selling ('writing') the option needs to judge whether the price will rise or fall, and by how much. They hope the option will expire unused, meaning they keep the premium paid by the buyer for doing very little.

Insurers are like option writers homeowners pay premiums to receive a payout in case of disaster. Insurers calculate premiums using similar probability-based principles to option writers. If in doubt, they overcharge; few homeowners know how to price risk and would still insure even if they did. So optionality, exploited correctly, can be quite profitable.

Watch Tim Bennett's video tutorial: What are options and covered warrants?

Most Popular

Will energy prices go down in 2023?
Personal finance

Will energy prices go down in 2023?

Ofgem’s price cap is now predicted to fall below £2,000, based on average typical use, from July, for the first time since 2022. We have all the detai…
21 Mar 2023
What happened to Credit Suisse?
Economy

What happened to Credit Suisse?

UBS acquired Credit Suisse at £2.65bn on Sunday afternoon – significantly below its closing value on Friday, which was around £7bn. We take a look at …
21 Mar 2023
Rightmove: UK house prices up £3,000 as property market rebounds
House prices

Rightmove: UK house prices up £3,000 as property market rebounds

Rightmove’s latest house price index shows the property market has been resilient despite an economic downturn
20 Mar 2023