The Iran War Has Ratcheted Up Uncertainty. Why Some Investors Say Now Is 'Not the Time to React'

• UBS's Alli McCartney advised against reacting to short-term moves, calling Monday's rebound 'a false positive' and noting that institutional investors have 'derisked' portfolios and are staying cautious
• Julius Baer's Mark Matthews expects at least a 10% correction for the S&P 500, citing concentration in tech stocks and AI infrastructure spending limiting buybacks and dividends
• Bank of America analysts recommend small-cap stocks as positioned to outperform large-caps amid geopolitical volatility, while traders should focus on either very short-term opportunities or long-term structural winners

Summary: Iran War Uncertainty Tests Investor Resolve

Market Performance:

The S&P 500 has declined approximately 6% from its late-January all-time high and dropped more than 5% in March alone. Markets experienced volatile trading following President Trump's claims of "productive conversations" with Iran, though Iranian officials denied negotiations occurred.

Key Expert Warnings:

Financial experts are cautioning against reactive investment decisions during this period. Alli McCartney, managing director at UBS, described Monday's rally as potentially "a false positive" and advised investors to remain "disciplined and discreet" rather than trade impulsively. She noted that gold, bonds, and stocks are all down simultaneously—an unusual market condition.

Institutional Positioning:

Many institutional investors have "derisked" their portfolios and are maintaining that stance. Dave Mazza, CEO of Roundhill Investments, observed that while investors are hedging, they haven't engaged in indiscriminate selling. Markets haven't reached "full oversold conditions" that would encourage re-entry.

Outlook and Concerns:

Mark Matthews of Julius Baer anticipates the S&P 500 could experience a 10% correction from recent highs. He expressed concern about tech stock concentration in the index, particularly regarding hyperscalers' heavy AI infrastructure investments limiting their capacity for buybacks and dividends.

Investment Strategies:

Analysts recommend either very short-term tactical trading to capitalize on intraday volatility or extending time horizons to focus on long-term structural winners. Bank of America suggests small-cap stocks may outperform large-caps during geopolitical volatility. Matthews identified China and Hong Kong as markets with strong potential. Energy sector investments are also recommended for those concerned about elevated oil prices.