Colm Kelleher joins other executives and regulators warning of growing risks in the booming market.
Bullish signals for futures are fading but there could still be some gains ahead.
Minneapolis-based firm reported to be considering options.
Total reflects improving sentiment for developing economies' outlook.
As COP28 gets underway, reform of multilateral development banks is proposed.
Weak China data has added to growing pessimism.
Oil prices are under pressure ahead of a key production cut decision.
Fund managers are worried about risks in the big tech sector.
Despite current upward trajectory, there are some headwinds for emerging markets.
Global stocks struggled for direction with US markets closed Thursday.
