Geopolitical shocks — terrorist acts, wars or military action — can give your portfolio a significant negative charge. The leading geopolitical source of market instability in 2025 has been the Middle East, as in years past. Israel’s decision to attack nuclear facilities in Iran in an attempt to retard that country’s weaponization efforts prompted a 1.1% drop in the S&P 500 index on June 13.Among the losers that day, according to S&P Global Market Intelligence, were leisure-travel companies Norwegian Cruise ...