The cryptocurrency sector in the US stock market fell broadly, with Riot Blockchain dropping over 6%

ChainCatcher news, U.S. stock market opens, Dow Jones up 0.15%, S&P 500 up 0.04%, Nasdaq down 0.05%. Shopify (SHOP.N) surged 20%, with third-quarter revenue increasing by 26% year-on-year. Bitcoin rose and then fell back, cryptocurrency concept stocks broadly declined, Riot Blockchain (RIOT.O) dropped over 6%, Coinbase (COIN.O) fell more than 4%, MicroStrategy (MSTR.O) decreased nearly 2%.