Worthless Securities DTCC Non-Transferable list

[Yosako]

So for an example: if stock ABC has 18 previous days of no vol. but on day 19 it has 100 mil. total trading volume, & on day 20 (previous day) it has 7.5 mil. in total trading vol., then you would have to take 107.5 mil divide it by 20 days (107.5/20 = 5.375 mil)? So the max Zecco would allow an individual to sell stock ABC is 5.375 mil. the next day (day 21)? Is that correct?

20-day ADV would be 5.375 million, but Zecco would allow orders only up to 10% of that aka 537.500 shares. Lame!

Selling more than 537.500 shares would require a call. Add that to the DTC certificate fee passing to customers and...guess why everyone and his brother left Zecco in masse.