The 10-second delay, which was calculated by the analysis firm Nanex LLC, indicates that something rare was likely happening in global markets Tuesday morning: Human beings were seeing — and reacting to — news before computer trading programs could move on it. In an era of super-fast algorithmic trading in which delays are measured in milliseconds and less, the ten second gap indicates that possibly no one in global markets has yet figured out a way to incorporate Donald Trump’s tweets into their trading algorithms. If they had, the market response would likely have come much, much faster.
via Can algos trade Trump’s tweets? Absolutely. Maybe. — CNBC