None that I know of, but I don't think EOS is supposed to be thought of as currency. My understanding is that EOS will work like Ethereum's gas, that runs smart contracts and dapps, except that the user will not be responsible for burning a certain amount of gas per use, instead the developer deposits EOS (that is not burned, but is held) for as long as the smart contract or dapp is active, thus allowing users to interact for free. At least, that's how I understand it.