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I don't think you get how the stock market works - short term linear news announcements do not indicate market translations. The stock market is the instantaneous auction price of ~100 market participants at any point in time - it can go in any direction for any reason.

For the vast majority of the time the stock market is stable until such a time as a whale moves markets and the feedback loop begins.

While I understand the gist your comment, you probably didn't read the link. This is exactly how the market works: traders don't have time to follow closely all the markets of all companies they are trading, so they will eat whatever canned news they get -- provided it came from a reputable source.

So when JP Morgan issues a memo saying "Formlabs ... could be a threat to incumbent 3D printer solutions at the low-end of the market in the near-term... First take: potential negative for DDD" - and in the exact same week that Wired published a cover page with Bre Pettis and his good-looking MakerBot Replicator 2... well, maybe it's time to lock in the 110% gains you had this year with DDD and move on...

Traders really don't trade that many companies a year - they specialise - and if they did so many that they followed canned news - well lets just say they wouldn't be in business very long.

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