Cuba says the speedboat from Florida entered Cuban waters and opened fire; Cuban forces returned fire, killing four

This incident marks a significant escalation in tensions between Cuba and the U.S., with direct military engagement reported. Such developments could lead to a reassessment of risk sentiment towards both nations, impacting related assets like currencies and commodities. Monitor the situation closely, as sustained conflict could create volatility in regional markets and affect oil prices given Cuba's proximity to major shipping routes.