What does VSTM's options flow data indicate about market sentiment for September 2025 expirations?

It appears there is no specific options flow data for VSTM (Verastem, Inc.) for September 2025 expirations readily available in the provided search results. The search results included options data for other tickers such as MSFW, OBIO, ADAM, MCHB, LSXMA, LSXMK, XYZG, ALTI, CEPO, UPB, HES, and AVGW, but not VSTM. The only direct mention of VSTM in the results pertains to its short interest and short volume data, not options activity.

Therefore, based on the current information, it is not possible to determine market sentiment for VSTM's September 2025 expirations from options flow data. To gain insight into VSTM's options market sentiment, further investigation into its specific options chain and trading activity would be required.