Jim Breyer, a well-known Silicon Valley investor, revealed in an interview with the media in Davos that he is "vigorously buying" $NVIDIA Corp(NVDA)$ and $Advanced Micro Devices(AMD)$ shares "heavily" and predicts that AMD will be the next company to join the "Big Seven". "I have not underestimated Nvidia. It's the leader, but having a second source (for AI French fries) will help solve the difficulties in the ecosystem."I would add AMD to the 'Magnificent Seven' stocks, says VC investor Jim BreyerBut AMD also faces the risk of overvaluation. Data shows that Nvidia's prospective price-to-earnings ratio is around 28 times, higher than the average semiconductor stock price of 23 times, while AMD's prospectiv