Shorting a stock does not make automatically make negative opinions about it invalid any more than going long makes positive opinions invalid. The whole point o

Shorting a stock does not make automatically make negative opinions about it invalid any more than going long makes positive opinions invalid. The whole point of shorting, and the reason why it's legal, is to give people incentive to find overvalued stocks and thus correct valuations. It's like people with a negative outlook on a company can't win: if they short, they're accused of being biased. If they don't short, they're accused of tossing out accusations with no skin in the game.