FTSE 100 closes at record high

The UK's benchmark stock index has reached an all-time high.

The FTSE 100 index of most valuable companies on the London Stock Exchange closed at 8,505.69, breaking the record set last May.

It had already broken its intraday high at 8532.58 on Friday afternoon, meaning it reached a high not seen before during trading hours.

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The weakened pound has boosted many of the 100 companies forming the top-flight index.

Why is this happening?

Many are not based in the UK, so a less valuable pound means their sterling-priced shares are cheaper to buy for people using other currencies, typically US dollars.

This makes the shares better value, prompting more to be bought. This greater demand has brought up the prices and the FTSE 100.

The pound has been hovering below $1.22 for much of Friday. It's steadily fallen from being worth $1.34 in late September.

Also spurring the new record are market expectations for more interest rate cuts in 2025, something which would make borrowing cheaper and likely kickstart spending.

What is the FTSE 100?

The index is made up of many mining and international oil and gas companies, as well as UK banks and supermarkets.

Familiar to a UK audience are lenders such as Barclays, Natwest, HSBC and Lloyds and supermarket chains Tesco, Marks & Spencer and Sainsbury's.

Other well-known names include Rolls-Royce, Unilever, easyJet, BT Group and Next.

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FTSE stands for Financial Times Stock Exchange.

If a company's share price drops significantly it can slip outside of the FTSE 100 and into the larger and more UK-based FTSE 250 index.

The inverse works for the FTSE 250 companies, the 101st to 250th most valuable firms on the London Stock Exchange. If their share price rises significantly they could move into the FTSE 100.

A good close for markets

It's a good end of the week for markets, entirely reversing the rise in borrowing costs that plagued Chancellor Rachel Reeves for the past 10 days.

Fears of long-lasting high borrowing costs drove speculation she would have to cut spending to meet self-imposed fiscal rules to balance the budget and bring down debt by 2030.

Long-term government borrowing had reached a high not seen since 1998 while the benchmark 10-year cost of government borrowing, as measured by 10-year gilt yields, was at levels last seen around the 2008 financial crisis.

The gilt yield is effectively the interest rate that investors demand to lend money to the UK government.

Only the pound has yet to recover the losses incurred during the market turbulence. Without that dropped price, however, the FTSE 100 record may not have happened.

Also acting to reduce sterling value is the chance of more interest rates. Currencies tend to weaken when interest rates are cut.

(c) Sky News 2025: FTSE 100 closes at record high