Interesting statement made in the AFR today: "In a discussion...

Interesting statement made in the AFR today: "In a discussion paper released this week, the exchange proposed that companies with a market value of under $20 million or less than $5 million in NTA would be prevented from listing".

Obviously this statement is merely part of a discussion at this stage, however I found it interesting. A bit of tech market uncertainty, it seems. What's to stop tech companies from partaking in back-door listings like THD, though?!