
Thailand plans to use an adjusted refinery-margin formula, deducting specified extra costs, and treat net margins above 2.40 baht per litre as excess profit for energy-price relief. Refiners have already contributed more than 30 billion baht toward holding down diesel prices, and the government is seeking higher dividends from state-owned PTT to add revenue to public finances.
The policy directs refinery margins toward consumer energy-price support, including diesel, which may constrain fuel pricing and refinery returns. Lower diesel costs could ease feed production and transport expenses, although the report does not quantify a specific commodity-market impact.
After 21 past bearish policy events, ULSD / Diesel moved a median -2.4% over 5 sessions (38% higher; middle half -6.5% to +4.7%), and -1.1% over 20.
Moves of each commodity's benchmark from the last close before the event. Historical reads pool past events of the same kind; they describe what happened, not what will. Not investment advice.