市场的乐观情绪集中在 AI 领军企业和超大规模云端业者（hyperscalers），投资者称 AI 建设已带来可观回报，且盈利增长强劲。但文章也指出了多项脆弱迹象：今年 S&P 500 的涨幅中，仅4档股票就贡献了超过一半；SOX 的预估本益比超过25倍，而10年平均为19倍；持仓过于拥挤，技术指标也显示超买。许多投资者表示，如果30年期美债殖利率持续稳定高于5%，这波涨势可能会破裂；在全球债券抛售与通膨疑虑再起之下，这一水准已受到考验。
这32位投资者提到的主要风险是停滞性通膨、偏鹰派的央行，以及对企业获利过度乐观。美国 S&P 500 每股盈余在第一季较一年前上升超过27%，比分析师预测高出逾2倍，且除重大复苏期外，这是自2004年以来最快的增速；欧洲获利则年增7.5%。这些涨幅已经提高了2026年剩余时间的门槛，受访者警告，即使 S&P 500 和 Nasdaq 100 本周创下新的历史高点，任何获利失望或殖利率进一步上升，都可能引发更急剧的股市回调。
Bloomberg News interviewed 32 investment managers across the US, Asia, and Europe, including people at Wells Fargo Investment Institute, Amundi SA, and BMO Global Asset Management, and found a strongly bullish mood even as rising yields worry investors. About 80% said equities should beat other asset classes such as commodities and bonds over the next 3 to 6 months, and roughly half chose megacap technology and artificial intelligence stocks as their top investment idea. The rally has been powered by a 7-week, record-setting advance in the S&P 500 Index, while Nasdaq 100 and Philadelphia Semiconductor Index, or SOX, have also repeatedly hit records.
The enthusiasm centers on AI leaders and hyperscalers, with investors citing tangible returns from AI build-out and powerful earnings growth. But the article highlights major signs of fragility: just 4 stocks have accounted for more than half of the S&P 500’s gains this year, the SOX trades at more than 25 times forward earnings versus a 10-year average of 19, and positioning is crowded with technical indicators flashing overbought conditions. Many investors said the rally could break if the 30-year Treasury yield stays sustainably above 5%, a level already being tested amid a global bond selloff and renewed inflation concern.
The main risks named by the 32 investors were stagflation, hawkish central banks, and overconfidence in corporate earnings. U.S. S&P 500 earnings per share rose more than 27% in the first quarter from a year earlier, more than 2 times analyst forecasts and the best pace since 2004 outside major recoveries, while European earnings improved 7.5% year over year. Those gains have raised the bar for the rest of 2026, and interviewees warned that any earnings disappointment or further yield increases could trigger a sharper equity pullback even after the S&P 500 and Nasdaq 100 set fresh all-time highs during the week.