Saudi Arabia's Tadawul All Share Index fell approximately 5 percent on the last trading day before President Trump's August 1 announcement cancelling a planned strike on Iran. The decline came as oil prices retreated on de-escalation expectations — but the Trump announcement arrived after the Riyadh market close. [1]

The timing matters. The Tadawul sell-off was anticipatory, not reactive. Traders were pricing in a resolution that had not been signed, announced, or confirmed. Saudi equities are the fastest liquid indicator of war-risk repricing in the Gulf, and the 5 percent drop reveals how thin the de-escalation bet is.

The TASI stood at 10,678 on July 28, down from 10,856 at the start of the month. Energy stocks, which had surged on elevated oil prices, led the decline as Brent crude fell below $91. The kingdom's sovereign wealth fund, the Public Investment Fund, holds significant positions across the index, and the broader market had already been under pressure since the war's first week, when Iranian missiles struck oil facilities and military bases. [2]

The paper's Hormuz thread has documented the gap between financial market pricing and physical reality since the blockade began. Oil prices are retreating on optimism. Ships are still being attacked. Insurance rates for Gulf transits remain elevated. The Tadawul's 5 percent drop is the stock market version of the same miscalculation.

What happens when the market opens after absorbing Trump's actual announcement — the cancellation, the claim of a deal framework, and Iran's denial that any talks are underway — will be the real test. A further decline would suggest the de-escalation bet is holding. A rebound would mean the market is repricing for the gap between rhetoric and reality. Saudi Crown Prince Mohammed bin Salman raised concerns about the military approach before the cancellation, according to the paper's lead story. The sovereign response and the market response may diverge.