Treasuries Pare Advance After US Economic Data: Markets Wrap.

US services activity expanded by the most in over two years, causing Treasuries to pare gains. The S&P 500 fell 0.3% as the market faces a quarterly episode known as "triple witching," where derivatives contracts tied to stocks, index options, and futures are set to mature. Short interest in major equity exchange-traded funds has reached record lows, leaving equities vulnerable to negative news. The ongoing artificial intelligence frenzy, driven by companies like Nvidia Corp., has led to record inflows into tech funds. [Extracted from the article]