(Bloomberg) -- Kathleen Moriarty was unable to help the Winklevoss twins get regulatory approval to sell bitcoin exchange-traded funds. That's because she's a lawyer and financial superhero, not a magician.

Moriarty is dubbed Spiderwoman because she helped pioneer the first Standard & Poor's Depositary Receipts, abbreviated SPDR and pronounced "spider." Her ability to get the green light for what were then a new type of ETF made her the perfect person to get the Winklevoss Bitcoin Trust off the ground.

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