The S&P 500 and the Nasdaq composite index lost more than 1 percent. The Dow Jones Industrial Average fell 1.8 percent, dragged down by three of its 30 stocks.

The Dow Jones Industrial Average (DJINDICES: ^DJI) index edged 3.9% higher in May, with 70% of its 30 constituent stocks ending the month in positive territory. However, the two worst-performing Dow stocks in May -- both from the healthcare sector -- kept the index's rally in check, with one of them plunging over 25%.

The blue-chip Dow Jones Industrial Average was headed for its worst daily drop in almost a month on Friday as the Israel-Iran conflict rattles investors, after easing back from session lows. The Dow was down about 774 points,

Stock index futures sank on Friday after Israel targeted Iran with a series of strikes against nuclear sites and military targets, raising fears of an all-out war in the Middle East.  S&P 500 futures (SPX) -1%,

It's a very competitive industry, but Verizon's large annual revenue and free cash flow provide plenty of resources to invest in technology and features to protect its competitive position. On that note,

Markets rebounded after Trump said his administration intends to send letters to US trade partners to formally establish new tariff terms.

Shares of Sherwin-Williams Co. and Visa are trading lower Friday afternoon, propelling the Dow Jones Industrial Average selloff. The Dow was most recently trading 822 points, or 1.9%, lower, as shares of Sherwin-Williams Co.

The major averages posted modest gains on Thursday, placing them on track for a winning week. Softer-than-anticipated inflation reports helped lift stocks.