Something funky happened in Unilever trading just before Kraft-Heinz announced it attempted a takeover (UL, KHC)

On Friday, Kraft-Heinz confirmed that it had approached Unilever about a $143 billion merger in what would be one of the largest M&A deals ever.
This followed a Financial Times post breaking the news early on Friday that Unilever had been approached to create one of the world's largest consumer goods companies. Unilever and Kraft, however, subsequently said the offer had been rejected.
Recent options trading in Unilever, however, has raised some eyebrows as a spike in upside bets s