I think the rogue trade had next to zero overall effect, having seen this type of thing about 10 times over my trading experience.
The overall effect was next to zero... ok if you means years from now....
momentum was stopped for sure and from the number of posts on this board you can magnify that in terms of effect... technical players were stopped long enough to say wtf... and the result was to have the momentum exhausted...
in 20 plus years you saw this 10 times... that should tell us all something!
IMO not an accident and sold by a "friend"... whoo bought does not matter and the small amount of money matters even less... momentum was killed for the day!