I believe theI bought options, and I did not exercise themgives...

I believe the

I bought options, and I did not exercise them

gives the ..(from ATO)
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Answer 5

If the capital proceeds on the sale or expiry of the rights or options are more than their cost base, you make a capital gain.

If the capital proceeds are less than their reduced cost base, you make a capital loss.
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So its straight out loss if they expire worthless is my conclusion. Think I will risk the remaining $30 of value and see what happens.