Both Boyne and McGraw have left Invesco to pursue an opportunity with another firm in North America, it explained.
Invesco said there would be no change to the investment strategy of the fund and added it would make a fund manager appointment in the new year.
The announcement comes just days after Invesco detailed changes to the management of two of its other funds, one of which is also in the global equity range.
Mustoe chairs the global equity group which until last week ran the Global Opportunities Fund as a team as well.
Stephen Anness has now stepped up to lead manage the Global Opportunities Fund with the running of his UK Aggressive Fund passing to Martin Walker, who manages the UK Growth Fund for the group too.
Invesco has also seen its head of marketing, sales manager and sales director depart recently.
On the latest news, Mustoe said: “We are committed to our global equity income franchise in which we have invested significant resource over the last four years and we look forward to building on these foundations in 2013 and beyond.”
“Managing global equity portfolios successfully requires the support of a strong team. In addition to the global equities fund managers, we also have the wealth of experience supplied by the GEG. It provides our global equity team with superior market intelligence, helping them to identify the best ideas from anywhere in the world.”
