[U.S. stock market opens: Dow Jones up 0.3%, S&P 500 up 0.4%, Nasdaq up 0.3%] According to Golden Finance, on August 19, the U.S. stock market opened with the Dow Jones up 0.3%, the S&P 500 index up 0.4%, and the Nasdaq up 0.3%. Moderna (MRNA.O) surged 90% after announcing with Merck that the Phase 3 trial of their mRNA cancer vaccine was successful, marking a historic breakthrough in melanoma treatment. Merck (MRK.N) rose 8.4%. Marvell Technology (MRVL.O) gained 9.7% as the company issued warrants to Google to purchase up to 58.97 million shares. SK Hynix (SKHY.O) rose 4.2%, with plans to repurchase and cancel shares worth 40 trillion Korean won.