Don't know, either, ron, but looking at yesterday's chart, I saw where the sharpest dropoff occurred after the first half hour and the sharpest gain during the last half-hour -- both periods when ptsc is prohibited from buying back shares.
Might be a coincidence, might not.
Also, if tax-loss selling was going on, people who want back in would have to do so today or earlier in order to allow 30 days before the dec. 15th deadline for J3/B1 to divulge prior art in discovery.
JMHO/FWIW