I see where you're getting at Burnett however if the ASX Index...

I see where you're getting at Burnett however if the ASX Index Rebalance was indeed the motivating factor then;

a) Why didn't they sell their entire holdings in BBG instead of just $1,000,000 worth?

b) If they were selling to accommodate the rebalance on Friday then why buy back in a day later...and bigger?

This trade wreaks of inside information, I've reported it to ASIC so they can take a look at it.