The Brent-Dubai EFS (Exchange for Swaps, the cash bridge that prices light Atlantic Brent against the Middle Eastern Dubai marker) jumped about 21% in a day to $4.24 a barrel on Wednesday 8 July as Strait of Hormuz risk came back into the tape1. The premium reasserted in Brent specifically, against Dubai, rather than lifting the whole crude complex evenly, and that is what makes it a spread story rather than a flat-price one.
The trigger sits on another desk. After IRGC (Islamic Revolutionary Guard Corps) strikes on commercial vessels near Hormuz and the CENTCOM (US Central Command) retaliation that followed, Brent settled 5.2% higher at $78.02 on Wednesday, having briefly topped $80 intraday before fading2. It held that war premium into Thursday 9 July. The intraday-$80 against a settle near $78 is the desk's tell: the fear held the tape for an afternoon, not the close.
That move partially unwinds last week's trade. When OPEC+ (the producer group led by the Organisation of the Petroleum Exporting Countries and Russia) lifted August supply, it widened Brent-WTI (West Texas Intermediate) to $3.26 on a narrowing-to-come bet. A Brent-Dubai widening now pulls against a Brent-WTI trade set up on the opposite logic, in the same five sessions. The April spike took this same spread to $21 a barrel; at $4.24 the market is repricing risk, not repeating the panic.
