For those who are constantly asking for proof of manipulation: Fresh from today
"A Chicago federal judge sentenced a former Deutsche Bank AG trader to a year and one day in prison on Monday on fraud charges for manipulative trading in precious metals futures, saying the scheme undermined confidence in the markets.
Prosecutors said at trial that Vorley and his former colleague Cedric Chanu defrauded market participants by placing and then cancelling decoy orders to move commodities prices between 2008 and 2013."
