(These are the market notes on today's action by Mike Santoli, CNBC's Senior Markets Commentator. See today's video update from Mike above.) Caution continues to eclipse conviction into a new week, with investors pondering unresolved questions over the AI sector, anxiety over an economic soft patch under a wait-and-see Fed and a further purge in the most aggressive assets (high-beta/low-quality stocks, crypto, riskier credit). The S & P 500 has been under pressure from big year-to-date winners and risk-appetite proxies such as Nvidia , Palantir and Robinhood , and the index is now spending quite a bit of time near the lower end of a two-month range. A close under the 50-day moving average was the first since April. The low from the last two weeks of chop is around 6630. Beyond that, the lo

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