It is only my theory, but I think Gina Rinehart could be...

It is only my theory, but I think Gina Rinehart could be interested, or already has, a big interest in DTR, so your calcs might need to minus say 400M shares?

Hard to imagine a shrewd investor, and sometimes neighbour of DT (reported that she paid some large amount to live next to DT in Florida).

So the total share liquidity, if Gina is a holder and not a trader, might be only say 400,M, if a shorter gets that number wrong they could soon come unstuck with 100M daily volumes lately.

To be honest I am amazed at the unrelenting selling and some significant shorting makes sense, who is the supplier(s)?

DYOR but I hope my input helps you