Ken Fisher, founder of Fisher Asset Management, has issued a stark warning to investors regarding the recent diplomatic developments between the United States and Iran.

The billionaire investor argues that market participants are prematurely interpreting the breakthrough as a definitive end to Middle East tensions, a stance he views as dangerously complacent.

Fisher advises against treating certain equities as 'must-own' positions based solely on the assumption that geopolitical risk has been neutralized.

His commentary suggests that the underlying structural risks in the region remain intact despite the latest diplomatic signals, implying that the market's relief rally may be overextended.

This perspective aligns with broader caution among institutional investors who are wary of pricing in a permanent de-escalation.

While the diplomatic opening has provided a temporary reprieve for energy and defense sectors, Fisher’s analysis highlights the fragility of the current truce.