In a move that has rattled bond markets and sent defence stocks soaring, President Donald Trump has formally requested Congress to approve billions in emergency funding for military operations against Iran. The request, made amid deepening fractures within the Republican party, has prompted urgent warnings from UK defence analysts who see the Gulf’s stability hanging in the balance.
The White House’s ask comes as no surprise to those who track the administration’s bellicose rhetoric, but the timing is telling. With the President facing impeachment proceedings and a primary challenge, a foreign adventure provides a convenient distraction. Yet the cost is staggering. Early estimates suggest the supplemental budget could exceed $50 billion, a figure that would add significantly to the already bloated US deficit.
Markets reacted with a familiar mix of risk-off and sector rotation. The S&P 500 dipped 0.8% in early trading, with energy and defence firms the sole beneficiaries. Crude oil spiked 3%, hitting a four-month high above $68 a barrel, as traders priced in potential disruption to Strait of Hormuz chokepoints. The 10-year Treasury yield edged lower to 2.12%, reflecting a flight to safety and perhaps a tacit acknowledgement that war is inflationary but growth-negative.
Investor caution is warranted. A conflict with Iran would not be a repeat of the quick, low-cost Gulf Wars of the 1990s. Iran’s asymmetric capabilities its proxies in Yemen, Syria, and Lebanon its ability to mine the strait and launch ballistic missiles make this a different beast. UK defence analysts at the Royal United Services Institute have outlined scenarios where oil prices double, global supply chains fracture, and a refugee crisis engulfs southern Europe.
For the UK, the implications are profound. Our own defence budget is already stretched thin by commitments in Eastern Europe. A major Gulf conflict would trigger an automatic request for British support, likely involving naval assets from the HMS Queen Elizabeth carrier group. The Treasury would be forced to divert funds from domestic priorities, potentially pushing the fiscal deficit above the 3% Maastricht threshold. Gilt yields could rise sharply as investors demand a premium for British exposure to Middle Eastern risk.
Domestically, Trump’s request is a political gamble. Republican hardliners have long pushed for confrontation with Tehran, but moderate members of his own party are balking at the cost and the lack of a clear exit strategy. Senator Chuck Schumer, the Democratic leader, has already called the request ‘reckless’. The House could well vote it down, creating a constitutional crisis that would roil markets further.
Yet for all the noise, there is a cold calculus at work. The US defence industry stands to reap a windfall. Lockheed Martin and Raytheon have seen their shares rise on the news, and the lobbying machine is in full swing. In London, BAE Systems and Rolls-Royce have also gained, as investors bet on increased NATO interoperability spending.
The bottom line is this: uncertainty is the enemy of efficient markets. The probability of a military conflict in the Gulf has risen from 15% to 35% in the past 48 hours, according to betting exchanges. Sophisticated investors are hedging with gold, the yen, and long-dated Treasuries. The rest are simply watching their portfolios bleed.
As the House debates the emergency bill, the world holds its breath. Central bankers, from the Fed to the Bank of England, will be watching closely. A sustained oil price spike could force them to tighten policy prematurely, choking off a fragile global recovery. War, it seems, is the ultimate bear market catalyst.
