These buybacks are very popular, so there will almost certainly be a scaleback (as was the case with the CBA buyback). This should not be a point of "concern" as there is nothing one can do about it - it is entirely beyond the control of the investor.
WBC Price at posting:
$23.15 Sentiment: Buy Disclosure: Held
A personalised tool to help users track selected stocks. Delivering real-time notifications on price updates, announcements, and performance stats on each to help make informed investment decisions.
(20min delay)