BlockBeats news, October 10 - The U.S. Treasury Department's OFAC issued General License No. 135 on October 9 U.S. Eastern Time, allowing sales, delivery, and import transactions related to Russian-origin diesel, valid until April 7, 2027. Trump simultaneously announced a phased increase in diesel supply, involving a total volume of approximately 4.8 million tons; however, the Russian side stated it has not yet confirmed the specific supply volume and delivery schedule.According to TradingBeats monitoring, a whale on Hyperliquid holds a "short diesel, long U.S. crude" combination, with combined unrealized profit of approximately $14.7 thousand:- Diesel HO: 10x isolated short on 252,714 contracts, value approximately $1.1432 million, average entry price $4.5696/gallon, unrealized profit approximately $11.6 thousand, estimated liquidation price $5.0275;- WTI Crude CL: 20x cross long on 11,400.798 contracts, value approximately $1.0334 million, average entry price $90.368/barrel, unrealized profit approximately $3,095.Today, the whale shorted 232,034 HO contracts, approximately $1.0586 million, further expanding the diesel short position; the crude long position was previously held, with no trades observed during the same period. The portfolio direction points to diesel weakening relative to crude, possibly betting on refined product premium retracement.The diesel-to-crude spread has already begun to narrow. S&P Global data shows that the NYMEX front-month ultra-low sulfur diesel to WTI crack spread decreased by $6.45/barrel from earlier in the day to $96.80/barrel. As of press time:HO at $4.5235/gallon, down approximately 4.57% in 24 hours;CL at $90.64/barrel, up approximately 0.70%.According to conversion, the reference spread between the two contracts narrowed from approximately $109.07/barrel 24 hours ago to $99.35/barrel, a narrowing of approximately $9.72, or about 8.91%.Beyond supply relief expectations, refinery constraints have not disappeared. Dallas Fed researchers pointed out on October 8 that damaged global refining capacity and declining inventories may keep refined product premiums elevated even after Hormuz shipping resumes, and Russia being permitted to trade diesel does not mean actual supply has returned to normal.