Apple shares have plunged below $400 on the back of poll of 48 analysts which indicates that the company is set to announce record sales, but a slump in profits for the first time in 10 years, reports CNET. At the time of writing, Apple's stock was trading at $390, down over 44 percent from its record high of $702.11 reached some seven months ago. Although Apple is expected to report the strongest second quarter sales in its history, a sharp decline of around 10 percent in gross margins is expected to take the shine of the company's result.