China's DeepSeek is causing concerns among investors about the valuations of US tech stocks, particularly Nvidia. The arrival of DeepSeek has led to a drop in Nvidia's shares, with some investors cashing out and others waiting for more information about the technology. The AI mania has fueled a record-setting rally in US stocks, but doubts about US dominance in AI and uncertainty about interest rates and policies are clouding the outlook for US equities. Josh Pantony co-founder and the CEO of Boosted.ai joins Bloomberg Intelligence to discuss