Boeing shares rise on reports that Iran may have shot down a Ukrainian 737

The United States increasingly believes that Iran downed the plane soon after it took off from Tehran, CNN and other news outlets reported. The crash took place hours after Iranian rocket attacks on US forces in Iraq.

Early reports suggested the plane went down because of a mechanical problem. Investors were concerned that could add to Boeing's long list of 737 problems and could further disrupt its business. Shares of Boeing, which fell Wednesday, were up 2% on the news.