**[Bank of America Warning: Current Market Shows Late-Stage Internet Bubble Characteristics, AI Returns as Key Focus]** BlockBeats News, August 14 — The AI-driven rally continues to push U.S. stocks higher, but research from Bank of America warns that the current market is exhibiting characteristics reminiscent of the late stages of the 1999 internet bubble. The most prominent signals include the high concentration of the S&P 500, record-low active stock-picking activity, and persistent capital chasing a few AI winners. Recently, Nvidia teamed up with Wall Street giants to plan $500 billion in AI infrastructure financing, further amplifying these concerns. Optimists believe this will provide long-term funding channels for AI clients, supporting demand for chips, data centers, and computing power. On the other hand, cautious observers worry that such arrangements carry a "vendor financing" nature, potentially turning AI capital expenditures from industrial investments into more complex financial structures. Bank of America’s perspective suggests that when chipmakers, cloud providers, and large tech companies become the primary drivers of index growth, the apparent market prosperity may mask underlying vulnerabilities. If substantial funds flow passively into the highest market-cap AI stocks while active stock-picking declines, the rally will become increasingly dependent on the performance of a few companies. Should AI revenue returns lag behind the expansion of capital expenditures, index volatility could be magnified.