The companion argument is that neither of those industry changes were unexpected, and thus if the market is behaving intelligently (so much that "of course they

The companion argument is that neither of those industry changes were unexpected, and thus if the market is behaving intelligently (so much that "of course they're not buying/selling based on tweets!" applies) then they wouldn't have moved the needle as they would be priced in. Smart market actors are surely more likely to immediately respond to surprise news (like an official-seeming tweet announcing insulin is free) than they are to respond to news that was well understood. The company market cap is >$300bn, a $150m fine is a cost of doing business.