Copyright, 2014, Swiss National Bank.
(+) numbers mean purchases of USD, (-) numbers mean sales of USD. Unpublished data.
Source: Swiss National Bank
Release: Swiss Foreign Exchange Intervention
Swiss National Bank, Swiss Intervention: Swiss National Bank Purchases of USD against CHF (Millions of USD)© [CHINTDCHFUSD], retrieved from FRED, Federal Reserve Bank of St. Louis https://research.stlouisfed.org/fred2/series/CHINTDCHFUSD/, July 3, 2015.