Ann: Westpac announces $3.5 billion off-market share buy-back, page-342

Mate, if that's the only metric you are looking at then ok.

You'd need to run some factual figures. These are estimates.

There's approx 3.7bil SOI
At a buyback price of $23 (for example) that's around the 152 mil share buyback number.

It would reflect circa 4%

So if you wish to apply 4% to $23 it's close to $24.

So there you go.

Personally I think they need to cut costs, and probably need interest rates to increase so they can create margin.
And then provide decent dividends.
But my guess is that we're a year away if they hit it out of the park.

Good luck.