And with household debt relatively tame by historical standards (excluding student loans, which however will likely be forgiven at some point in the future), mortgage debt nowhere near the relative levels of 2007, the most likely catalyst to emerge is corporate debt. Indeed, in a NYT op-ed penned by Morgan Stanley's, Ruchir Sharma, the bank's chief global strategist made the claim that "when the American markets start feeling it, the results are likely be very different from 2008 —  corporate meltdowns rather than mortgage defaults, and bond and pension funds affected before big investment banks."

But what would be the trigger for said corporate meltdown?