The FTSE 100 touched a fresh all time intraday high this week, even as global markets swung on a divided US Federal Reserve decision and a sharp jump in oil prices. For UK investors trying to make sense of the moves, the story is less about technology stocks and more about energy, oil and interest rates. This article sets out what the Fed decided, why oil prices spiked and what it could mean for the index and its constituents. This information is for information purposes only and does not constitute financial advice.
The Federal Reserve held its key interest rate steady at a range of 3.50% to 3.75% on 29 July 2026, but the decision was far from unanimous. Three regional Fed presidents, Beth Hammack of Cleveland, Neel Kashkari of Minneapolis and Lorie Logan of Dallas, dissented in favour of a quarter point increase instead (CNN, 29 July 2026).
Fed Chair Kevin Warsh described the split as a “good family fight” and said the decision should not be read as a pause, but as an ongoing review of the economic picture (CNBC, 29 July 2026). Going into the meeting, market pricing showed unusually high uncertainty, with FedWatch data from the CME, the Chicago Mercantile Exchange, putting the odds of a surprise rate rise at around 31.5% (CoinStats, citing CME data, 29 July 2026).
The disagreement may be centred on which of the Reserve’s twin policy aims should take precedence; unemployment remains low but inflation above target.
For UK investors, the takeaway is less about the outcome itself, which matched most economists' expectations, and more about the tone. A divided committee with limited forward guidance can mean more volatility around each new piece of economic data between now and the Fed's next scheduled meeting.
Oil prices jumped because of renewed military conflict in the Middle East, not because of any change in global supply and demand data.
Brent crude settled 7.9% higher at $90.74 a barrel on 29 July 2026, after fresh airstrikes reignited fighting in the region (Reuters, reported via EBC Financial Group, 29 July 2026). On the same day, energy shares on the FTSE 100 rose 2.9%, the best performing sector of the session (Reuters).
Oil prices have swung sharply through 2026 as the conflict has moved between periods of escalation and pause. That volatility makes the direction of the next move genuinely uncertain, and this article does not attempt to predict where oil prices go from here.
The FTSE 100 hit a fresh all time intraday high on 29 July 2026, but the rally was concentrated in a handful of sectors rather than broad based.
The index touched an intraday peak of 10,951.06 points before closing at 10,908.41, up 0.34% on the day (Reuters, 29 July 2026). Gains were led by energy, mining and banking shares, while shares with less direct commodity exposure moved less.
| Sector or company | Move on 29 July 2026 | Reported driver |
| Energy sector | +2.9% | Oil price surge amid Middle East conflict (Reuters) |
| Standard Chartered | +3.8% | Quarterly earnings beat and new buyback (Trading Economics, 29 July 2026) |
| Rio Tinto | About +1.3% | Rise in Q2 profit and cost reduction plan (Trading Economics, 29 July 2026) |
| Reckitt Benckiser | +4.3% | Quarterly sales ahead of forecasts (Trading Economics, 29 July 2026) |
Around 75% of FTSE 100 corporate income is generated overseas, according to LSEG data (cited by ts2.tech, 26 July 2026), which is one reason the index can move on global events even when little changes in the UK economy itself.
This pattern reflects the index's composition. The FTSE 100 carries heavy weightings in energy, mining, banking and pharmaceutical companies, and very little exposure to large semiconductor or software firms. That means a global sell off in technology shares, of the kind seen recently in US and Asian markets, does not automatically drag the FTSE 100 down in the same way, and an oil price spike can be a net positive for the index even as it raises broader inflation concerns (EBC Financial Group, 29 July 2026).
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A number of scheduled events and ongoing trends look set to shape the index's next moves. AJ Bell's dividend dashboard estimated total FTSE 100 dividends of around £88.8 billion for the year, alongside declared buybacks of about £36 billion, according to investment director Russ Mould. These are estimates and running totals rather than confirmed outcomes (AJ Bell, cited via EBC Financial Group, 29 July 2026).
The next scheduled Fed interest rate decision falls at the September FOMC meeting on 15 and 16 September 2026 (Fox Business, 29 July 2026). Markets will also continue to watch the path of the Middle East conflict, since further escalation or a cooling of tensions could move oil prices, and by extension the FTSE 100's energy weighted sectors, in either direction.
This article does not predict how the index, oil prices or the Fed's next decision will move. Past performance is not a reliable indicator of future results, and any historical figures cited above describe what has already happened, not what is likely to happen next.
Investing always involves risk, and the value of investments can fall as well as rise, meaning you could get back less than you put in. Some investors use periods of sector rotation, such as the current strength in energy and mining, to review how diversified their portfolio is across sectors and geographies, rather than concentrating in whichever area has recently performed well.
Because around three quarters of FTSE 100 constituent revenue comes from overseas, currency movements, global growth data and geopolitical events often matter as much to the index as UK domestic news. You are responsible for your own investment decisions, and this section is provided for general information rather than as a recommendation.
In summary: the current FTSE 100 strength is driven mainly by energy and mining shares reacting to oil prices, not by a broad based improvement in UK economic conditions, and the outlook remains sensitive to both the Middle East conflict and the Fed's next moves.
Why did the FTSE 100 hit a record high despite global market jitters?
The FTSE 100 rose mainly because of strength in its energy, mining and banking constituents, which benefited from higher oil prices and a run of stronger than expected earnings, even as some other global markets, particularly technology heavy indices, came under pressure (Reuters, 29 July 2026).
Will the Fed raise interest rates in September 2026?
No one can say for certain. Ahead of the July meeting, CME FedWatch data implied around a 31.5% probability of a rate rise, and market pricing can shift as new economic data is released (CoinStats, citing CME data, 29 July 2026). This is not a guarantee of what the Fed will decide next.
How does the oil price affect the FTSE 100?
Because the FTSE 100 includes major oil companies such as Shell and BP, along with mining and banking firms exposed to commodity cycles, a rise in oil prices can lift the index even when it also raises broader concerns about inflation (EBC Financial Group, 29 July 2026).
What is Brent crude?
Brent crude is a major global benchmark price for oil, used to price roughly two thirds of the world's internationally traded crude supplies.
What is the FOMC?
The FOMC, short for Federal Open Market Committee, is the branch of the US Federal Reserve responsible for setting the target range for the US federal funds interest rate.
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