In a matter of months, this word, blockchain, has gone viral on trading floors and in the executive suites of banks and brokerages on both sides of the Atlantic. You can’t attend a finance conference these days without hearing it mentioned on a panel or at a reception or even in the loo. At a recent blockchain confab in London’s hip East End, the host asked if there were any bankers in the room. More than half the audience members, all dressed in suits, raised their hands. ... Now, everyone’s trying to figure out whether the blockchain is just so much hype or if Masters’s firm and other startups are really going to change the systems that process trillions of dollars in securities trades. When investors buy and sell syndicated loans or derivatives or move money around the world, they must cope with opaque and clunky back-office processes that rely on negotiated contracts between buyers and sellers, lots of phone calls, lots of lawyers, and even the occasional fax. It still takes almost 20 days, on average, to settle syndicated loan trades. ... A June report backed by Santander InnoVentures, the Spanish bank’s fintech investment fund, estimated the blockchain could save lenders up to $20 billion annually in settlement, regulatory, and cross-border payment costs. ... Venture capitalists plowed $400 million into dozens of digital currency startups in the first six months of this year, a fourfold jump from all of 2013, according to industry news site CoinDesk.