In the light of the more recent flash crashes of the silver and gold, the ethereum and the major plunge of the GBP in the autumn of 2016, it's good to have a look at the flash crashes from recent years, caused by random “fat fingers”, or by deliberate actions. Some had a major impact on the markets, while others were plain stupid.
additional history of fat finger errors: http://thenewdaily.com.au/money/finance-news/2014/10/02/historys-biggest-fat-finger-trading-errors/
These are opportune times to spot and trade off of. Buy every flash crash and ride the position up the entire day for easy gains.
I think there were nothing deliverated, but there were not enouhg protections as halts, etc for fast movements at those times.about silver,gold etc I think those are just price adjustments.
"The Financial Conduct Authority (then still FSA) fined Perkins £72,000 and banned him from trading for five years, noting that "Mr Perkins poses an extreme risk to the market when drunk"."
First AA reunion : "My name is Steve. I am here with you because I pose a systemic risk when I am drunk."