The Swiss National Bank's (SNB) foreign-currency holdings rose 1.7% to a record high in August, according to fresh data published on the central bank's website on Monday.
The reserves increased to CHF540.4 billion at the end of August, from a revised CHF531.2 billion in July.
The Swiss franc declined about 2% against the euro last month, increasing the value of the central bank's foreign-currency reserves in franc terms. At the end of Q2 2015, 42% of the central bank’s holdings were in euros.
Swiss central bank is scheduled to announce its quarterly monetary policy assessment and decisions next Thursday, September 17.