From 7/22/17 to 8/21/17, the “All fundamentals” universe filtered with
MktCap > 25 AND Price > 3
jumped by 45%. Upon closer inspection, one stock (AMBO) shot up from $0.01 to $12.25.
Obviously the price history has errors that should be addressed. But what is interesting here is that the rule
Price > 3
didn’t filter it out. That’s because on rank date 7/22/17, the price was listed correctly as 4.80. But the screener “bought” the stock for 0.01 despite the rule.
A giveaway is that the price jumped on 0 volume days.
Our automatic price filling mechanism could fix this if we strip out 0 volume days from the database. But we can’t do this for some stocks since the volume is always 0 (pink sheets and ADRs). So it’s a bit of a pickle to try to fix it ourselves.
We’ll report this particular one. They should fix it; but there will be others still.