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Foolish to place orders before the market opens?
This would otherwise be a comment, but I wish to share an image. A stock I happened to own, gapped up on the open to $9.20 and slowly worked its way down to $8.19 where it closed up 6% but near its low for the day.  This is an addendum to my comment above, warning about buying a stock on the open when news is coming out. Or more important, to be mindful of that news and the impact it might have on the stock. In this case, when the news came out and the stock had closed at $7.73, one would need to decide if he wished to buy it at any cost, or place a limit order.  I've redacted the name of the company, as this discussion has nothing to do with any particular stock, I'm just offering an example of the effect I warned about, three weeks ago. (Full disclosure, I got out at $8.70 in the first minutes of trading.)