The unblinded data looks better than any unblinded data out there so no there is much to show that this is most likely a positive trial. If anything there should be a bump for the market willing to take the risk and reward it will be positive.
Look at the daily volume and then look at the short volume. The short volume is overwhelming part of the daily volume. With a Merck employee jumping on board, the stock should be at a minimum $1B even if negative speculation, and it isn’t.
Put blinders on and believe what you want to believe.