FTSE 100 records its first weekly decline in five weeks as mining stocks retreat and Strait of Hormuz tensions keep oil near $88 per barrel
The FTSE 100 posted its first weekly fall in five weeks in the week ending 14 August 2026, driven by a retreat in mining stocks. Oil prices held at around $88 per barrel amid an escalating standoff between the United States and Iran over the Strait of Hormuz, through which around 20% of global oil supply passed before the conflict. Donald Trump threatened to declare the Strait of Hormuz a US territory, saying he would make the declaration 'pretty soon'. Iran rejected the statement, with deputy foreign minister Kazem Gharibabadi posting that the strait 'will be opened and closed only under Iran's command'. Ship-tracking analysis from Kpler showed just two vessels passed through the strait on Friday, with no crude oil shipments visible. The strait has been effectively closed for approaching six months following the outbreak of conflict between the US and Iran on 28 February 2026. Separately, UK analysts warned that continued increases in US long-dated borrowing costs could push the UK economy toward recession.
Why this matters
A sustained Hormuz closure at around the six-month mark is no longer a short-term supply shock: it is reshaping global energy pricing and creating persistent volatility in commodity-exposed equity markets, directly affecting FTSE 100 mining and energy constituents. For London's capital markets, the combination of elevated oil prices, US bond market stress, and recession warnings creates a challenging environment for new equity issuance and secondary offerings, as investors reassess risk appetite. The diplomatic escalation between Trump and Iran raises the probability of a prolonged closure, which would keep energy and inflation pressures elevated across UK and European economies.
On the Ground
Capital markets lawyers advising on FTSE 100-adjacent transactions, particularly in the energy and mining sectors, need to factor sustained commodity price volatility into prospectus risk factor disclosure and material adverse change clause drafting. Equity capital markets teams will be monitoring whether the market dislocation is sufficient to delay planned offerings. A trainee on a live equity offering would be updating risk factor sections of a prospectus to reflect current geopolitical and commodity price conditions, and assisting with verification notes tying market-data statements to sourced figures from ship-tracking and oil price data providers.
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