When is the latest you can enter a Market On Open Order for NYSE stocks?

I thought it was 928, but I entered one after 928 and it worked

 

Depends on the ecn, diffrent ecns diffrent cut of times

 

NYSE

 

I've had NYSE MOO & LOO orders accepted seconds before the open, even after 9:30. Nasdaq must be entered by 9:28.

 

On NYSE stocks sent to the NYSE, you can send them anytime BEFORE the stock opens. Sometimes an NYSE stock will open well after 9:30am EST, especially if there is news on it.

GT

 

There are different gateways to Nyse specialist. about 5 of them on some platforms. some have 9:28 cut off time some 9:29 and some till specialist opens.

 

NASDAQ stocks have to be entered before 9:28. For NYSE, as long as the stock hasn't opened yet it is still good to send.