Enron was doing some bad things in energy markets, but they were profitable bad things and unrelated to the collapse. What brought Enron down was accounting pro

Enron was doing some bad things in energy markets, but they were profitable bad things and unrelated to the collapse. What brought Enron down was accounting problems, with many of the specific details having clear parallels here. In particular, the "circular financing" agreements look very structurally similar to things like the Merrill Lynch barges. They're not exactly the same, but Nvidia's statements in the source article make me more rather than less concerned; does it just so happen to be the case that their investment targets all want to spend lots of money on Nvidia products, or does an Nvidia investment come with implicit and unaccounted guarantees that the target will spend lots of money on Nvidia products?