Trump preparing 90-day diesel export ban to tackle record prices.

This would be the first halt since Obama lifted the oil export ban in 2015.

Diesel's up 100%+ in nine months. Futures just dropped 7% on the news.

Short-term relief for domestic prices, but could ripple through global energy markets and logistics costs. Trucking, manufacturing, agriculture all watching closely.

If it happens, expect volatility in energy stocks and anything tied to freight costs.