No matter how tragic events may be, professional traders are sometimes compelled to view events through the lens of the financial markets. And sudden, unexpected events such as the shooting Wednesday in Ottawa, Canada's capital, often trigger weakness.
Specifically, a gunman shot and killed a Canadian soldier standing guard at a war memorial; the gunman then entered Parliament, where numerous shots rang out, police and witnesses said.
Speaking about the impact of these events, on CNBC's "Power Lunch," Robert Pavlik of Banyan Partners noted the markets turned negative after the news broke. "The market was already on edge and the news added worry and concern," he said.