美股上半年一路高歌猛进，标普500创历史新高，投资者欣喜，尤其在科技类股与 meme stocks 频频上涨的带动下。但谁都没料到—— 狂欢可能正掩埋着“泡沫”的警讯 。

Nine of the 11 primary S&P 500 sectors ended higher, with technology and financials leading the advance by rising 0.98 ...

According to Rabobank, many investors cited "uncertainty," "unpredictability," and "unreliable" when describing the U.S.