Why Is Defiance Daily Target 2X Short ASTS ETF ($ASTN) ETF Up +33.07% Today? (Find out why any stock moved today on Tickeron.) ASTN surged +33.07% to $25.23, up from a prior close of $18.96. The primary catalyst was a sharp decline in ASTS (AST SpaceMobile), which ASTN tracks at -2X daily inverse exposure. SpaceX secured a key regulatory and spectrum advantage, pressuring the direct-to-device competitor that ASTN is built to short. The move amplified roughly two times the single-day drop in ASTS, consistent with the fund's leveraged inverse design. The advance reflected a single-stock, sector-specific catalyst rather than broad-market or space-sector momentum. Investors are watching FCC rulemaking, spectrum developments, and ASTS technical levels for the next move. $ADBE $ALTO $BBAI