Hyliion is trading 5.07% down at $3.83 as rising Treasury yields and oil prices weigh on broad U.S. markets. - Reuters reported that these pressures, with investors awaiting the Federal Reserve’s September meeting minutes, were weighing on market sentiment. - Search results showed no fresh company-specific announcement explaining the decline. - Securities lawsuit coverage concerns an October 27 lead-plaintiff deadline and earlier events; it does not establish a cause for the move.