But Citi notes that while no single driver stands out for the shift in sentiment, a few headlines deserve note:

Traders are watching Bloomberg highlights from the Sohn Conference. Currently, hedge fund manager Glen Kacher speaks on the rising risks of cyber attacks on the financial system. He warns that a successful attack could trigger the next financial crisis.

Before Kacher, we saw headlines from the Trump Administration. He still favors a tougher Iran deal and there continues to be no plans to lift sanctions before North Korea takes concrete actions for ultimate denuclearization.

In Canada, reports are coming in of an incident. A driver of a van in Toronto hit pedestrians - PM Trudeau says that the government is still gathering information. The reason or cause for the incident is not known.