Dow Tumbles 450 Points; US Small Business Sentiment Declines In August - PDS Biotechnology (NASDAQ:PDSB),
U.S. stocks fell Tuesday, with the Dow Jones dropping 450 points. The NFIB Small Business Optimism Index declined to 98.7 in August. PDS Biotechnology (PDSB) shares surged 178% after raising $22.55 million in equity funding. Energy shares rose 1.4%, while healthcare stocks fell 2.2%.

