Nvidia is, in crucial ways, nothing like Enron – the Houston energy giant that imploded through multibillion-dollar accounting fraud in 2001. Nor is it similar to companies such as Lucent or Worldcom that folded during the dotcom bubble.But the fact that it needs to reiterate this to its investors is less than ideal.Now worth more than $4tn (£3tn), Nvidia makes the specialised technology that powers the world’s AI surge: silicon chips and software packages that train and host systems such as ChatGPT. Its pr ...