Delaying the deal as long as possible may allow bond yields to continue to fall with increasing demand for gold miners' bonds. (By the way, I say August 2017 because it may take that long for the gold price's 36-month moving average to hit $1400/oz., what SRK consulting's 2014 analysis assumed, as I recall).

http://www.businessinsider.com/ubs-mark-haefele-interview-with-business-insider-2016-7

Mark Haefele is ... global chief investment officer at UBS Wealth Management. In that role, he oversees the policy and strategy for about $2 trillion in assets. ...

Haefele: ... One of the interesting recommendations that we put out is for the bonds of gold producers, because while the gold price has run up a lot in the short term — and so that's very volatile — it should improve the prospects for the gold producers, and their bonds have an attractive yield. ...

Oyedele: Do you find gold stocks attractive?

Haefele: We prefer bonds because we see in our clients around the world a tremendous reach for yield. So anything with a decent coupon is attractive, and because of the high gold prices it should improve the prospects for a lot of the gold producers. So it's for us the least volatile way of taking advantage of higher gold prices.