It would seem that bid-offer spreads are falling, which we might regard as positive. But volatility has risen, as has cross-market contagion.
实际上，高频交易公司所说的“向零逼近”，就是指交易速度接近于光速。我们应该欢迎这种趋势吗？光速的交易会带给我们自由市场的天堂吗？