If you want an easy example look at this Super Micro spy chip story [2] by Bloomberg Businessweek. It's absolutely unsubstantiated [3], caused 40% drop for SM share price, but two years later it's still up.
[1] except that one time Tiel funded a lawsuit
[2] https://www.bloomberg.com/news/features/2018-10-04/the-big-h...
[3] https://www.theregister.com/2018/10/22/super_micro_chinese_s...