A buy back when sentiment is good and therefore when the price...

A buy back when sentiment is good and therefore when the price is high is a stupid waste of money.
Do it when the price is low and sentiment is bad so the company is buying itself at a bargain price which shows it's own confidence in itself and creates the sentiment, which turns it better which makes SP go up which makes buying itself at the deflated prices a master stroke.
.... As long as they keep enough cash to keep building SDV.
otherwise company will have to raise capital which will cause dilution and drive SP back down. But even in this worse case scenario the company would still be buying itself at a cheap price and selling itself at a high price so still not the end of the world but I would hope that even with buy backs that GXY may manage to find a partner before the cash runs out