I don't think the drop in share price is due to the leaking of inside knowledge, the market today is down 1.6% which is huge, the major banks are down 1.5% each.
Many giants are to release their quarterly sales and because Wesfarmers Ltd gave a bad report today and my opinion is that investors are now bracing for 'bad earnings' from other companies such as BKL and NAB which are due tomorrow.