This month we saw another highest all time for Blue Chip FTSE 100 Index of leading British actions. This has happened many times this year.

However, 2025 was filled with economic uncertainty for many reasons, from geopolitical tensions to uncertainty about international tariff regimes. Meanwhile, the British economy almost does not look like it was the healthiest.

So why is FTSE 100 on fire – and how can investors consider the reaction?

A lot to like, but a lot to worry!

FTSE 100 contains a welding machine of various companies.

Some focus on the British market, while others conduct most of their activities abroad. Some are in mature industries, while others have stronger growth prospects. Some pour out the huge amounts of surplus cash, while others are struggling with their profitability.

So I do not see the necessary contradiction between the leisurely economy and the FTSE 100 record efficiency. Some index companies have recently worked solidly.

Meanwhile, the nature of the index and its quarterly reviews of membership means that companies with growing market capitalization remain in it more often, while others with shrinking valuations can give up.

But while the index goes gangbusters, wider economic results ultimately affect the FTSE 100 in the long run. I still have some concerns about this result, although this may still set up-to-date up-to-date records in the coming months.

The prospects for the growth of the economy in Great Britain remain unusual. While FTSE 100 remains affordable in relation to its American counterpart, its valuation no longer looks like a possible opportunity, which she made a few years ago.

Buying individual shares

This is one of the reasons why I do not plan to invest in the FTSE 100 tracking fund.

But the main reason is that I prefer to buy individual shares than to track the index.

While the FTSE 100 index rode high, not all the actions in it did so well.

As an example, consider JD Sports (LSE: JD). Its share price dropped by 32% in just one year. Ouch!

This is not without reason. As revealed today, a commercial update, which in the first half of the year, fell by 2.5%. It is worrying that the sales results were similar in the second quarter than in the first quarter in Europe and Great Britain.

This may suggest continuous weaker demand, despite the fact that the company has reported a stronger trend in the second quarter in Asia and the Pacific. Sales in North America are reminded for reminding, but less than in the first quarter.

But for similar sales they do not tell a full story. Thanks to the opening of more stores, the company’s total sales are still growing.

It is strongly profitable, and his growing global trace gives her the benefits of the scale. Together with the extensive store opening program from recent years, JD capital expenditure will be found, helping profitability.

Although it still assesses the possible impact of American tariffs, for now JD Sports expects this year’s profit before taxation and adjusting items will be in line with the expectations of analysts. Currently, they are in the range of 852 million GBP 915 million GBP.

On the contrary, the market capitalization of JD Sports below 5 billion pounds looks low to me. I think that the investors of the FTSE 100 shares should take into account.