G1 Capital payment for shares

when the company pays a non-assessable amount

payment less cost base of shares

no capital loss

G2 Shifts in share values

when the shift happens

the decrease in the shares' market value (so far as it has shifted into certain other shares) less the corresponding proportion of the shares' cost base

no capital loss

G3 Liquidator declares shares worthless

when the liquidator makes the declaration

no capital gain

shares' reduced cost base