BCA Research analysts warn of potential 'black swan' events that could destabilize markets in 2026, moving beyond U.S. political risks. Their note to clients, led by Matt Gertken, identifies geopolitical and technological shocks as the primary tail risks for investors, shifting focus from domestic policy.

A major oil shock could emerge from an Iran succession crisis, wiping out global spare capacity of roughly 4 million barrels daily. Simultaneously, a Chinese AI breakthrough—like the 2025 DeepSeek episode—could again challenge Western tech valuations and prompt questions about U.S. indispensability.

Further risks include a Chinese attack on Taiwan, which could halt electronics shipping and impact U.S. output, or a Russian move on a NATO ally forcing U.S. defense commitments. BCA advises investors to stay overweight in U.S. and non-China emerging market equities until these hurdles clear.