I think that it’s not unreasonable to exchange hundreds of thousands of contracts in the direction opposite to the current market trend given the volume of about 1.2M for ESU19. The instance where 386k were bought may be a little bit more suspicious, but then why they didn’t buy much more on Monday before the news when the price was much lower? They would have really done a killing doing so. I’m no trader but I’m quite skeptic of these accusations based on my once in a while glance at the ESU19 L2 market data in the past months.