TESLA AND ALPHABET SHARES SLUMP IN PRE-MARKET TRADING

Alphabet shares pare back overnight as investors scrutinise its ever-increasing capex plans. Tesla is also down after missing on earnings while free cash flow turns negative. Elsewhere, Unicredit raises its outlook after posting a beat on both the top and bottom lines as CEO Andrea Orcel tells CNBC the bank is firing on all cylinders. And forex headwinds take a bite out of Roche's first half sales, but the Swiss drugmaker confirms its full-year targets.

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