The strike is costing Boeing an estimated $1 billion a month, and new CEO Kelly Ortberg is working to keep the company afloat. Boeing is raising up to $25 billion through stock and debt offerings. It's arranging a $10 billion credit agreement with major lenders amid a production and regulatory crisis.

There was substantial upside if one bought Boeing stock” during prior strikes in 1989, 1995 and 2005, an analyst says, though a 2008 strike that coincided with the Great Recession was an outlier.

Boeing's stock rises as tentative agreement ends strike, but financial concerns persist amid challenges in product quality and leadership.

Boeing and its new management team have not matched the union demands, causing a pause in production at its factories and a huge cash burn that is draining the company's finances. Here's why this strike is a bad sign for Boeing's business and puts more strain on an already stretched balance sheet.