If ASIC,ASX & APRA were fair dinkum about cleaning up the financial markets they would totally ban bot trading and all short selling any stock not secured(by that stock) being short sold.
They should also ban directors STI packages,ensure they have a greater proportion of their packages paid in stock so their interests are aligned with mums & dads shareholders,they should also limit total holdings to 15% and then tighten up trading in stock by directors to a specific period rather than limiting their creeping positions to 3% every 3mths.