"At least until we see sustainable stabilisation across the macroeconomic and geopolitical arenas, we believe it no longer makes sense to provide short-term return guidance," Chief Executive Sergio Ermotti said in a call with analysts for the bank's second-quarter results.

"However, we still believe we can achieve our targets in a more normalized environment."

In its results presentation, UBS kept its target for adjusted return on tangible equity of more than 15 percent but no longer gives a timeline for the goal. It had previously guided for 2018. The bank also no longer gives expectations for adjusted RoTE for 2016 and 2017.

(Reporting by Joshua Franklin; Editing by David Holmes)