MOO market on open - does one always get the open price?

Quote from cunparis:

Very interesting thread, I see I'm not the only one. Thanks for the link.

The bottom line is that if one depends on the open price for a strategy (to verify against previous tests or backtesting) then it's best to skip the NYSE. MOO is unpredictable.

I'll experiment with how a limit order will work for me, but it complicates things because I'll have to tag my journal entries NYSE and do the status on them separately.

It is even worse for Nasdaq then. Present opening auction process was introduced only 2 years ago if I remember right. Before it was just first print of the day.
 
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