Market Close: Stocks Rise, Gov't Action Lowers Yields, Positive Cancer Drug Trial • 8/19/26

• Major market averages (Dow, S&P 500, Nasdaq) closed higher on Wednesday, with the Dow up 119 points.
• Treasury's plan to double its debt buyback program led to lower bond yields and a slight dip in mortgage rates.
• Merck shares surged 12% and Moderna shares soared 176% on positive Phase 3 trial results for a personalized cancer vaccine.
• US crude oil prices rose above $85 a barrel, with diesel prices reaching $5.50/gallon nationally, nearing all-time highs.

The market experienced a 'winning Wednesday' with major averages closing higher, driven by a Treasury announcement to double its debt buyback program, which lowered bond yields. Pharmaceutical companies Merck and Moderna saw significant gains following positive clinical trial results for a personalized cancer vaccine. Rising oil and diesel prices, however, present an inflationary concern.