Early Monday a single bitcoin BTCUSD, +0.03% was fetching $6,423.21, down 0.1% since 5 p.m. Eastern Time on Sunday on the Kraken crypto exchange. As bitcoin trading ranges narrow, records continue to tumble. “As it turns out, [bitcoin] XBT futures and cryptos in general are moving with very little speed. The week ending Oct. 26th was the least volatile since futures were introduced nearly a year ago,” wrote Kevin Davitt, senior instructor for The Options Institute at Cboe Global Markets. “Furthermore, the average weekly [volatility] for XBT futures in October was around 6.6%, which is way below the average of 15.65% ... (full story)