[Bank of America: Market Sentiment Remains 'Extremely Optimistic,' AI Bubble Becomes Top Tail Risk for Investors] BlockBeats News, February 17 – According to the monthly fund manager survey released by Bank of America on Tuesday, market sentiment remains 'extremely optimistic,' but further asset appreciation appears increasingly challenging, and global investors are growing more concerned about excessive corporate investment. The survey, which covered 162 fund managers overseeing $440 billion in assets, found that cash balances rose to 3.4% from a record low of 3.2% in January. Meanwhile, investors remain heavily overweight in commodities and equities while significantly underweight in bonds. Macro optimism has further improved, with the proportion of respondents expecting a 'boom' in the global economy reaching its highest level since February 2022, and the proportion expecting earnings growth of over 10% hitting its strongest level since 2021. However, a record proportion of respondents indicated that corporate spending is overly aggressive, and chief investment officers are now more inclined to strengthen balance sheets rather than increase capital expenditures. The AI bubble has once again become the top tail risk for investors.