American technology companies have plunged into a sharp reversal of the sale of technology stocks this year's record. The largest technology stocks, including Apple, whose shares fell 8 per cent, lost more than $150 billion from the company's market capitalization. Amazon, Alphabet and Microsoft ended the day more than 4 percent lower.

The sell-off also shaken commodity markets, with oil prices falling in Asian trading.

The dollar has managed to halt its recent slide, but the overall sentiment remains one of weakness given the Federal Reserve has strongly implied that it intends to keep rates low for a very long time. On top of this, there remain concerns about the strength of U.S. economic growth.

Graph compares the performance of Apple (candle chart), Microsoft (orange line) and Google (blue line) from the beginning of the week. 

Source: Trandingview.com