Two heavyweight infrastructure names publish half-year results on Thursday, the same day the Bank of England is widely expected to raise rates for the first time since August 2023.

Few combinations of events are as neatly aligned as this one. On Thursday 5 November, BT (LSE:BT.A) and National Grid (LSE:NG.) are both scheduled to report half-year results. On the same day, the Bank of England's Monetary Policy Committee announces its decision, with a 25 basis point rise from 3.75% to 4% widely expected. For two FTSE 100 companies that run large networks and carry substantial long-term Investment programmes, interest rates are never a side issue.

Why rates and energy matter to network businesses

Companies that build and maintain telecoms or energy networks tend to share some characteristics. They often spend heavily on long-lived assets, fund part of that spending with borrowing, and generate relatively steady cash flows over many years. Those features make them sensitive to interest rates in several ways.

First, there is the direct cost of debt. When rates rise, new borrowing and refinancing can become more expensive, although the impact depends on how much Debt is fixed, how long it runs and how it is hedged. Second, there is valuation. Investors often compare the income from steady, dividend-paying shares with the Yield available on government bonds. When bond yields rise, the relative appeal of such shares can change. Third, for regulated businesses, the frameworks that set allowed returns may take financing costs into account, though the mechanics vary and adjustments are rarely immediate.

None of this indicates how either company will be affected. It explains why both are often described as rate-sensitive, and why the timing of their results matters this week.

Expectations for Thursday are fairly settled. A quarter-point increase to 4% would be the Bank's first since August 2023. Looking further out, money markets had fully priced four 25 basis point increases by next September, according to LSEG data cited by Reuters.

Not everyone accepts that path. ING expects a follow-up hike in February but describes pricing for further hikes as looking "extreme". Alessia Berardi, head of global Macroeconomics at Amundi Investment Institute, said the market was pricing a full hiking cycle, but "we think that one or two moves will be enough..."

What matters for rate-sensitive shares is often not the decision itself, which is largely expected, but the guidance that accompanies it. Any hint that the Bank sees a longer or shorter tightening cycle than markets have priced can shift gilt yields and, with them, the valuation of companies whose appeal rests on steady income.

The reason rates are rising is closely linked to energy. Reuters reported that elevated oil prices have fuelled Inflation fears and that many central banks have already raised rates. ING put it bluntly, saying the worsening energy crisis had made it much harder for the Bank not to act.

Oil has been especially volatile this week. Brent settled on Monday 2 November at $104.77, down $8.66, or 7.63%, and crude slid about 2% on Tuesday as investors weighed talks aimed at ending the wars in Ukraine and Iran. Before the conflict began in late February 2026, about one-fifth of the world's Crude Oil and Natural Gas shipments passed through the Strait of Hormuz.

For an energy network operator, the wider energy crisis forms part of the operating and political environment, even if wholesale prices do not translate directly into its revenue. For a telecoms group, energy is an operating cost for running networks and data infrastructure. Investors may look for commentary on how each Business is managing those pressures.

What investors commonly look for

Half-year results offer more detail than quarterly updates. For infrastructure-style businesses, attention frequently centres on:

Capital expenditure plans:whether investment programmes are on track, accelerating or being reprioritised.

Net debt and financing:the level of borrowing, the mix of fixed and floating debt, and any refinancing activity.

Cash generation:operating Cash Flow and, where relevant, free cash flow after investment.

Dividend policy:the interim Dividend and any comments on future payouts.

Guidance:whether full-year expectations are reaffirmed.

Regulatory developments:any changes to frameworks that govern pricing or returns.

These are standard reference points rather than predictions.

How the index arrives at Thursday

The FTSE 100 heads into the decision on a softer footing. It closed on Tuesday 3 November at 10,638.43, down 122.90 points, or 1.14%, its steepest daily fall in a month, ending four consecutive sessions of gains. The FTSE 350 banks index slid 1.6% ahead of the Bank's announcement, and HSBC (LSE:HSBA), down 2.0%, was the biggest single drag in points terms. Miners also weighed, with the basic resources index down 2.6% as copper hit a multiweek low.

Sterling was trading at around $1.3417 and 83.53p per euro on Monday. Currency moves around a rate decision can matter for any company with overseas operations or foreign-currency debt.

For illustration only, consider how a 25 basis point move works on a hypothetical £100,000 floating-rate loan: 0.25% of £100,000 is £250 a year in additional interest. Large companies' debt structures are far more complex, but the example shows how a quarter-point change scales.

Key dates to watch

Wed 4 Nov:Eurozone inflation figures, expected at 3.9%.

Thu 5 Nov:BT and National Grid half-year results.

Thu 5 Nov:Bank of England MPC decision, with a rise to 4% widely expected.

Fri 6 Nov:US October jobs report.

Thu 12 Nov:ONS first quarterly GDP estimate for July to September, at 7:00am.

The bottom line

BT and National Grid share more than a reporting date. Both are capital-intensive network businesses whose valuations and financing are closely tied to interest rates, and both report on the very day the Bank of England is expected to deliver its first hike in more than three years. With markets already pricing several further increases and some economists questioning that path, the tone of the Bank's guidance may count for as much as the companies' own figures in shaping how their shares respond.