January 23 (Reuters) - On January 23, Sinopec's sales companies executed butadiene prices at 9,900 yuan/ton, unchanged from the previous trading day. The domestic butadiene market continues its upward trend, supported by tight spot supply, auction premiums, and strong downstream synthetic rubber demand. Although purchasing remains cautious due to profit pressures, suppliers maintain firm quotations, and low-priced sources are scarce, indicating that the tight supply situation persists. Overall, spot market prices are expected to continue rising today, with close attention to downstream transactions and inventory levels. Chempricehub analysis of butadiene, with a bullish-bearish score of 1.5, notes that the spot market is experiencing tight supply and significant auction premiums, while strong demand from downstream synthetic rubber supports price increases. Despite cautious purchasing due to profit pressures, firm supplier quotations and scarce low-priced sources suggest that the tight supply situation remains unchanged, with spot prices expected to continue rising today. In the futures market, butadiene rubber contracts such as 2610 closed at 13,080 yuan/ton (up 655 yuan), and 2611 closed at 13,210 yuan/ton (up 815 yuan). Trading volume and open interest indicate active market participation, with the upward trend supported by spot market fundamentals, which is favorable for futures prices.