U.S. stocks ended modestly higher Wednesday as long-term Treasury yields fell sharply. The S&P 500 rose 16.22 points, or 0.21%, to 7,707.98, ending a three-session losing streak. The Dow Jones Industrial Average gained 119.65 points, or 0.22%, to close at 53,463.05. The Nasdaq Composite added 41.38 points, or 0.16%, finishing at 26,331.09. Falling government bond yields helped major indexes recover after several sessions of pressure from rising borrowing costs. Bond prices climbed after the U.S. Treasury Department announced larger liquidity support buybacks for longer-dated government debt. Starting September 9, the maximum purchase size will increase from $2 billion to at least $4 billion per operation. The change covers nominal coupon securities in the 10-to-20-year and 20-to-30-year maturity sectors. The increased amounts will remain in effect through November 4. The department said strong volumes of high-quality offers supported the decision to increase liquidity operations in those sectors. Treasury yields moved lower following the announcement, reversing part of a recent rise in long-term borrowing costs. The 10-year Treasury yield fell to about 4.65%, while the 30-year yield declined to about 5.20%. Bond yields move inversely to prices, so stronger demand for government debt pushed yields lower. The retreat eased pressure that had accompanied

Eco-friendly vehicles provided the strongest lift to South Korea’s auto exports during the month. Their export value increased 25.5% from a year earlier to US$2.59 billion. Electric and hydrogen vehicle exports rose 31.9% to US$940 million. Hybrid exports advanced 22.2% to US$1.65 billion. By contrast, exports of internal combustion engine vehicles fell 3.1% to US$3.65 billion. Eco-friendly models accounted for about 41.5% of the country’s total automobile export value in July.

Diesel prices remained elevated on Wednesday as tighter refined-product supplies kept pressure on fuel markets in the United States and Europe. U.S. ultra-low sulfur diesel futures jumped 7.4% on Monday to settle at $4.19 a gallon. That marked the contract’s biggest daily gain since July 13. Early Wednesday trading put the contract near $4.28 a gallon, while European diesel refining margins remained at historically high levels after rising nearly 10% on Monday.