Opening rotation logic

hi guys

i noticed some times a stock starts trading at 9:30 EST but the options starts trading later at 9:45 EST.

And i noticed that at 9:45 EST all option exchanges opens at the same time

The timing seems to be coordinated.

Is there a rule or logic to determine when the options will open ?

Does news like FDA, takeovers or earnings affect this ?

Thanks appreciate any info.

 

If the underlying stock is traded on the AMEX or NYSE, the option exchanges will wait until the stock begins trading (on the primary market) before they will open option trading.

 

thanks freehouse.