A Wall Street analyst flags 3 'toxic' forces pushing the stock market toward a tipping point

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• The US stock market is near a critical inflection point, Piper Sander said.
• The firm's analyst said 6,600 is a key level to watch for the S&P 500.
• They flagged a "toxic macro triad" of forces pushing US stocks to the edge.

The S&P 500 is on track for its fourth week of declines and is edging closer to an inflection point, Piper Sandler's top technical analysts said on Thursday.

"Equity markets are reaching a tipping point," a note from the firm said...