The FTSE Is Down 11% Since Iran — Your Savings Account Doesn't Care

The FTSE 100 has wiped out all its 2026 gains. Every penny of growth from January and February — gone. UK government borrowing costs have surged to their highest since 2008 as markets price in the inflationary shock from disrupted Middle Eastern oil supplies.

Analysts are now warning of up to four interest rate hikes in 2026. Four. The Bank of England cut rates six times from August 2024 to reach 3.75% in December 2025 — and the market is now pricing in a complete reversal of that easing cycle.

Set that against what cash is paying. The best easy access savings accounts offer up to 4.75% with no lock-in. NS&I's Direct ISA pays 3.50% completely tax-free. Long-dated gilts yield around 4.43% according to FRED data. You're being paid handsomely to sit in safety.

For savers who haven't yet used their 2025/26 ISA allowance, the ISA hub explains how to shelter up to £20,000 from tax entirely. Even a cash ISA at 3.50% beats equities right now on a risk-adjusted basis.

Every market downturn produces the same chorus: "stay invested, it always recovers, don't panic." The opposing argument — that panic-selling costs more than the crisis itself — usually has the data on its side. A trade war tantrum or a banking wobble tends to resolve within months.

The Iran crisis is structurally different. The Strait of Hormuz carries roughly 20% of the world's oil and liquefied natural gas. Trump has given Iran until 6 April to reopen it — barely a week from now. If that deadline passes without resolution, we're looking at sustained energy price disruption that feeds directly into UK inflation, household bills, and corporate margins.

The Ofgem energy price cap changes on 1 April. Consumer confidence is already cratering — the BBC reports a "ripple of fear" hitting spending. Petrol has topped 150p per litre. This isn't a sentiment-driven sell-off that bounces back when social media calms down. It's a supply shock with a hard deadline and no obvious resolution.

The HMRC Personal Savings Allowance means basic-rate taxpayers can earn £1,000 of savings interest tax-free annually — and higher-rate taxpayers get £500. Combined with cash ISA shelter, there's substantial scope to earn meaningful tax-efficient returns without equity risk.

For our savings guide, the implication is clear: cash is earning a real return while equities are bleeding. Those considering longer-term fixed deposits should also check our gilts hub for government bond alternatives.

Here's the calculation most "stay invested" advocates won't make for you. The equity risk premium — the extra return you expect from stocks over safe assets — only makes sense when cash pays nothing.

Between 2009 and 2021, the Bank of England base rate sat between 0.10% and 0.75%. Holding cash was punishing. You had to take equity risk because the alternative was guaranteed real losses.

That world is over. With easy access accounts paying 4.5%+ and the FTSE 100 down 11% in a month, the premium for taking equity risk has turned negative. You're being punished for courage, not rewarded for it.

The Bank of England's rate decisions have created an environment where cash is genuinely competitive with equities on a risk-adjusted basis for the first time in over a decade. When you can earn 4.75% risk-free while the stock market loses 11%, the opportunity cost of cash is zero. The MoneySavingExpert savings comparison shows dozens of accounts above 4%, all FSCS-protected.

For higher-rate taxpayers, the maths tilts even further towards tax-sheltered options. A cash ISA removes the tax drag entirely, and our tax planning guide explains how to structure savings across ISA, pension, and taxable accounts for maximum efficiency.

Nobody sensible goes 100% cash. But shifting from a typical 80/20 equity/cash split to 60/40 during a genuine crisis is prudent, not panicky.

Practically, that means:

• Easy access: Keep 3-6 months of expenses in accounts paying 4.5%+. Chase, Trading 212, and several building societies are above this threshold according to MoneySuperMarket's latest comparison
• Fixed-rate bonds: Lock some capital into 1-year fixes at 4.36% or better while they last. Our fixed-rate savings guide has the latest rates
• NS&I products: The NS&I Direct ISA at 3.50% tax-free is worth the lower headline rate for higher-rate taxpayers. 100% government-backed with no FSCS limit
• Gilts: Short-dated gilts yield around 4.4% and offer capital gains tax advantages for higher-rate taxpayers who buy below par. See our gilts guide for how these work
• Premium Bonds: At a 3.30% prize fund rate from April, less competitive than best-buy accounts, but prizes are completely tax-free — attractive for additional-rate taxpayers who get zero Personal Savings Allowance

The point isn't to hide from markets forever — and if you do stay invested, pound-cost averaging reduces your timing risk. It's to earn 4-5% while waiting for the Iran situation to resolve, rather than watching your equity portfolio bleed another 5-10% if the April 6 deadline goes badly. For mortgage holders, our mortgages hub explains whether overpaying during volatile markets makes sense.

The hardest part of holding cash during a crisis is the FOMO. Markets might bounce tomorrow on a diplomatic breakthrough. You'll feel foolish for a week.

But consider the asymmetry. If Iran resolves quickly and the FTSE 100 rebounds 5%, you've missed 5% on the portion you moved to cash — but you still earned 4.5% annualised on that money. The cost of caution is modest.

If Iran escalates and oil supply is disrupted for months, equity markets could fall another 15-20%. The cost of bravery is catastrophic. For investors within 10 years of retirement, a 20% drawdown takes years to recover from — years you don't have.

Protecting capital isn't cowardice. It's the first rule of investing: don't lose money. Cash at 4.5% during a genuine crisis isn't a boring choice. It's the smart one.

This article is for informational purposes only and does not constitute financial advice. You should seek independent financial advice before making any investment decisions.