shares of dutch payments processor adyen adyen slumped 11 in early trade after missing expectations on ebitda even as payments volume soared 60 margins deteriorated after a 47 increase in operating expenses said paul charpentier an analyst at bryan garnier he also flagged a disappointing takeup rate note that the drop in take rate was driven by a combination of the ramp up in the ebay contract adyens tiered pricing strategy paired with growth from existing merchants already onboarded in previous periods and a bounce in airline volumes added analysts at stifel