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Intel CEO Brian Krzanich's sale of Intel stock in November before security flaws in the chip became public is raising some eyebrows among regulatory and legal officials.

Krzanich sold US$ 39 million (£29 million) worth of Intel stock on 29 November, The Wall Street Journal reported, months after the chip maker became aware of the Spectre and Meltdown vulnerabilities on 1 June. These take advantage of the speculative execution performance feature in modern CPUs make the memory of virtually all computers and devices accessible to hackers.

The trade took place under a Security and Exchange Commission regulation that allows company execs to arrange to sell shares at a preset time. The WSJ said Krzanich had set up this trade on 1 October, which was still well after the problems became known to Intel.

Executives at Equifax, which suffered a massive breach that exposed 145.5 million consumer records in 2017, were also accused of dumping their stock in the days leading up to the breach being made public.