Months before former President Donald J. Trump’s social media company unveiled an agreement to raise hundreds of millions of dollars last fall, word of the deal leaked to an obscure Miami investment firm, whose executives began plotting ways to make money off the imminent transaction, according to people familiar with the discussions.The deal — in which a so-called special purpose acquisition company, or SPAC, would merge with Mr. Trump’s fledgling media business — was announced in October. It sent shares of the SPAC soaring.Employees at the Miami investment firm, Rocket One Capital, had learned of the pending deal over the summer, long before it was announced, according to three people familiar with the firm’s internal discussions. Two of the people said that Rocket One officials at the time talked about ways to profit off the soon-to-be-announced trans …
