U.S. stocks hit reverse on July’s gains, with the S&P 500 putting in its worst day in three weeks. In Europe, earnings from Novartis, Alstom and SAP dominate the headlines, while Netflix shares sink after a big miss for Q2 subscriber growth. Facebook’s cryptocurrency Libra keeps finance ministers on edge at the G7 meeting in Chantilly, France. And Amazon shares come under pressure after the European Commission launches an anti-trust investigation into how the online retail giant uses merchants’ data.