Fundamentally, the underlying inspiration is the growth of these companies. The fact that interest rates are so low, and that investors are chasing yield elsew

Fundamentally, the underlying inspiration is the growth of these companies. The fact that interest rates are so low, and that investors are chasing yield elsewhere, helps to enable it. However, these deals would still happen even if debt were more expensive. On the other hand, if the company weren't showing promising growth, then the deals would not happen.