Trader Brian Jones on Twitter: "S&P futures up 13 but they've been trading erratic in a 20 point range since yesterday's close. Liquidity for small stocks trading so far has been light. Bitcoin is back in the $40,000's as expected." / Twitter

S&P futures up 13 but they've been trading erratic in a 20 point range since yesterday's close. Liquidity for small stocks trading so far has been light. Bitcoin is back in the $40,000's as expected.