Selling strikes Wall Street… The Dow sinks over 800 points in its worst day since June, as investors flee tech stocks in an abrupt end to the winning streak. Apple shares plunge 8 percent in the stock's worst day since March, as the tech giant loses $150bn in market value during the session. Asian equities see red, following US majors lower, as big technology firms across the region lead declines. And we are live at the Ambrosetti Forum on Lake Como where the mood among attendees remains cautious amid the market turbulence.

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