Why Is BeyondSpring ( $BYSI) Stock Down -31.25% Today? (Find out why any stock moved today on Tickeron.) BYSI shares fell about 31% in Tuesday's session, giving back a large portion of Monday's 44% surge. The primary catalyst was the announcement of an at-the-market (ATM) equity offering of up to 9.2 million shares, raising dilution concerns for a pre-revenue biotech. Profit-taking also weighed on the stock after Monday's sharp rally tied to an FDA Fast Track designation and a China strategic transaction. $GOSS $CYTK $VNDA $TAOX