Jerry Gulke president of the Gulke Group says when a market reacts negatively to positive news that’s not a good sign.

Analysts offered mixed signals on the S&P 500’s near-term outlook, making a Santa rally uncertain, pointing to potential volatility, amid atypical seasonality and rising bearish options sentiment.

Nvidia shares failed to sustain a rally on Monday despite a series of headline-grabbing announcements at the company’s annual ...