The S&P 500 just accomplished a first-time feat — and it suggests more wild swings ahead

The start to 2026 has brought no shortage of historic developments in global markets. Investors just witnessed another one over the past week.

For the first time ever, the S&P 500 index

SPX has swung from overbought territory to oversold territory, then back into overbought territory, all in under a week, according to analysts at Bespoke Investment Group.