Newbie question RE Post-market trades outside BBBO

[MojaveMax]

Why do trades show up in the post-market that are well outside the BBBO? This seems to happen frequently. TIA

 

[MojaveMax]

Could these be trades that were executed during the day, but not posted until after hours? Like dark pool trades?

 

[rmorse]

Quote from MojaveMax:

Why do trades show up in the post-market that are well outside the BBBO? This seems to happen frequently. TIA

What is BBBO? You could be looking at either sales posted late, or a sale vs an option trade, so it can print outside the market.

 

[Bob111]

Quote from MojaveMax:

Why do trades show up in the post-market that are well outside the BBBO? This seems to happen frequently. TIA

they show up during regular hours too...to screw up people with stops, and some guys, who like TA
probably some prearranged trades,but i agree-trades outside of NBBO should be either not posted or tagged somehow or filtered by providers. there is way too many of them all over the place every single day. it wasn't like that 3-5 years ago..

 

[MojaveMax]

Quote from Bob111:

they show up during regular hours too...to screw up people with stops, and some guys, who like TA
probably some prearranged trades,but i agree-trades outside of NBBO should be either not posted or tagged somehow or filtered by providers. there is way too many of them all over the place every single day. it wasn't like that 3-5 years ago..

Could the post-market trades be trades that actually happened during the regular market but were not posted till later?

 

[cfu]

The trades could've been preferenced to specific ECNs outside the shown BBBO.