Settling for more

摘要

BLOCKCHAIN, THE technology underlying bitcoin and other cryptocurrencies, was designed with an ideological aim: to sidestep central authorities and governments. But many people have become intrigued by its practical uses, such as updating back-office processes. And few institutions have shown more interest in such applications than financial exchanges.Although stock trades are often made in milliseconds by algorithms, completing them involves co-ordinating payment and delivery among a mess of databases and then reconciling the records. In big financial centres trades take two full days to settle. Some stock exchanges wonder whether blockchain's distributed, tamper-proof ledgers and immutable and transparent transaction records could speed up and simplify the process.