Why Goldie shares are going up?

Could someone please share some light into the reason why goldie stock shares are going up, whilst the POG hasnt increased that much compared to share price of goldie stocks.
I dabble with SAR, NST and EVN when opportunity presents itself.
Back in February, the POG peaked at AU$ 1590 and the price of SAR was .44, NST 2.36 and EVN 1.05.
Currently the POG is AU$1550 and the price of the above stocks are higher..
With todays POG, I thought a fair price for SAR would be around .43.
Could someone please enlighten. I am trying to understand the reason behind the movement.
thanks