The Dow Jones Industrial Average shed 196.09 points, or 0.8 per cent, to 25,313.14.
The Toronto Stock Exchange's S&P/TSX fell 90.47 points, or 0.55 per cent, to 16,326.51, led lower by the health care, consumer staples and utilities sectors.
The TSX's energy group rose 0.22 points, or 0.11 per cent, while the financials sector slipped 1.81 points, or 0.59 per cent.
Second quarter earnings are expected to increase 23.5 percent from the same period past year.
Microchip shares fell 9.9 percent, among the biggest decliners on the S&P, after disappointing second-quarter revenue forecast.
Seattle Man Dead After Stealing and Crashing Plane, Investigation Underway
Alaska Airlines said the plane was a Horizon Air Q400, which had an "unauthorized takeoff" from Sea-Tac around 8 p.m. local time. Air traffic controllers and pilots could be heard discussing a "ground stop" and dealing with a backlog of aircraft.
UMD Places Members Of Athletic Staff On External Leave Following External Review
The sources also revealed allegations of unhealthy eating habits and using food punitively against the players. McNair's parents are being represented by Baltimore attorney Bill Murphy, whose firm is also investigating.
Last-Minute Glitch Delays Launch of NASA's Parker Solar Probe
The Parker probe will swing close to the sun, then out around Venus , and back again, 24 times over the next seven years. According to NASA, the forecast shows a 60 percent chance of favourable weather conditions for launch.
"Today's impact has set the markets in a temporary risk-off sentiment", said Matt Forester, chief investment officer of BNY Mellon's Lockwood Advisors.
Brent crude futures fell 8 cents to $72.20 a barrel and US crude futures were down 2 cents at $66.92 a barrel. Tech stocks have been at the center of a sharp recovery in the S&P since a market rout in February, driving the index close to its record high.
Shares in leading USA banks also plunged significantly with Bank of America, Goldman Sachs, Morgan Stanley, and J.P. Morgan Chase all falling over one percent.
The Nasdaq composite rose 3.46 points to 7,891.78.
Declining issues outnumbered advancing ones on the NYSE by a 1.04-to-1 ratio; on Nasdaq, a 1.10-to-1 ratio favored advancers.