Nvidia says its AI chips don't have a 'kill switch' after Chinese accusation

What are the potential ramifications for Nvidia's upcoming revenue guidance and earnings forecasts? How does this geopolitical incident compare to previous US-China technology tensions involving Nvidia or its competitors? What impact might the clarification have on Nvidia's sales pipeline and relationships with Chinese AI chip customers? Will the absence of a 'kill switch' raise security or reliability concerns among enterprise and cloud customers? How will Nvidia's denial of a 'kill switch' affect NVDA's short-term stock price? What hedging or position-sizing strategies can be employed to manage exposure to this geopolitical risk? How might this development influence Nvidia's competitive positioning relative to AMD, Intel, and emerging AI chip makers? Could this lead to changes in US or allied government policies regarding AI hardware and component supply chains? How should the increased geopolitical risk be factored into NVDA's valuation multiples and risk premiums? Could this statement trigger increased regulatory scrutiny or export restrictions from the US or China?