Ann: Listed Option Expiry, page-23

MYL options expiry is 31st Dec, until then the SP will be moved,either way, by punters/speculators/investors,attempting to make the
most of the perceived arbitrage,or simply buying opportunity, which the imminent options expiry provides. Moi included.
Therefore,until this small window(14 or 15 business days) closes,be prepared for the SP to oscillate every which way.As Kalenn says above,this period of volatility will pass.
Good luck to all holders