Oil prices are now the stock market's biggest driver

Equity markets are currently shrugging off Middle East conflict, with strategists asserting that only a significant oil price surge, such as WTI reaching $120/barrel, would materially impact equities by fueling inflation and threatening the business cycle. On Monday, major US indices gained nearly 1% as Brent and WTI crude fell approximately 9% to below $71 and $67.50 respectively, despite geopolitical tensions. While Iran's parliament voted to close the Strait of Hormuz, a sustained oil price spike from this is not the current Wall Street consensus.

Analysis

Equity markets are currently demonstrating resilience to escalating geopolitical tensions in the Middle East, with major indices like the S&P 500, Nasdaq, and Dow gaining nearly 1% as oil prices retreated. Both Brent and WTI crude futures fell approximately 9% to below $71 and $67.50 per barrel, respectively, despite reports of Iranian missile strikes. Strategists from Morgan Stanley and Citi concur that the primary channel for geopolitical risk to impact equities is through a significant and sustained spike in oil prices. Morgan Stanley's Chief Investment Officer, Mike Wilson, quantifies this threshold as a 75% year-over-year increase in WTI, which would translate to a price of approximately $120 per barrel. Such a surge is viewed as a threat to the business cycle due to its potential inflationary impact on business and consumer spending. While Iran's parliament has voted to close the Strait of Hormuz—a critical chokepoint handling about 20% of global oil flow—the final decision is not yet made, and a closure is not the current consensus scenario on Wall Street. Therefore, the market's current positive sentiment is predicated on the view that oil prices will remain below a level that would materially damage the economic outlook.

Key Decisions for Investors

• Investors should prioritize monitoring crude oil futures (WTI and Brent) over geopolitical headlines, as strategists identify a significant price surge, not the conflict itself, as the key risk to equities.
• Consider a sustained move in WTI crude towards the $120 per barrel level as a critical threshold that could signal a market downturn by triggering inflationary pressures and threatening the business cycle.
• Closely track official decisions from Iran's Supreme National Security Council regarding the Strait of Hormuz, as a confirmed closure would be a primary catalyst for the oil price spike that analysts warn about, even if it is not the current base case.