Co-insurance Effect

You get married because your spouse has better credit than you. That’s smart. Your union will reduce the likelihood that you’d go broke because you now have two sources of income.

Which is pretty much the co-insurance effect.

Co-insurance effect is a theory that, when two companies merge or one acquires another, the marriage of these companies will reduce their exposure to debt. This theory goes that, by diversifying assets and debts, the likelihood that a firm will default declines sharply. This effect should reduce the bond yields of companies that have merged, thanks to new forms of cash flow.