How to pitch top hedge funds on the next hot alt-data set

  Happy Saturday! Hedge funds that love to use Robinhood data to hunt for winning ideas won't be able to tap its enormous pool of trades in quite the same way anymore. As CNBC first reported, Robinhood is no longer publishing how many customers held a particular stock, and the retail-trading app is also limiting access to its API. And as Dakin Campbell and Dan DeFrancesco learned, hedge funds were pinging other data providers within hours of hearing the Robinhood news to try to...