It is the latest foray into the world of Bitcoin for Cameron and Tyler Winklevoss, twin investors known for their legal battle over the creation of Facebook.
Winkdex "blends" the going price of a Bitcoin at the three largest exchanges. It's something you can already find on websites like Preev and Coindesk, but those don't have the Winklevii brand name behind them.
The point of the Winkdex? It will provide the price for the twins' planned Bitcoin-related investment fund, according to a Tuesday filing with the Securities and Exchange Commission.
The brothers are launching their own exchange-traded fund, called the Winklevoss Bitcoin Trust, to provide everyday investors a way to dip their feet into Bitcoin investing.
The price of a single Bitcoin is anything but stable. Since December, it's been as high as $1,163 and as low as $382. It's now at about $595. Lots of things weigh heavily on its value, because it's a new currency that's under close review by regulators, sometimes tied to online black markets like Silk Road and often the target of hackers looking for flaws in the digital network.
The Winklevoss brothers did not respond to requests for comment.
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