Boeing (BA, Financial) faces a significant threat to its credit rating from S&P due to an ongoing strike. The credit rating agency warns that Boeing could be downgraded to junk status. The strike is costing Boeing an estimated 1 billion per month. S&P expects Boeing to burn through 10 billion in cash by 2024, assuming the strike concludes in the fourth quarter. As a result, the company's year-end cash balance is expected to be below its target of $10 billion.Boeing currently holds a "BBB-" issuer credit r ...