Monday’s S&P 500 index futures session marked the first full trading week of 2026 after the winter break, with bulls delivering a solid gain and reasserting control.

Overnight action saw bulls steadily lift from Friday’s close, establishing the early low at 6899.50. Roughly an hour before the open, a stronger rally built momentum. The regular session opened with intensified chop, yet buyers maintained pressure. At 8:00 AM ET, December ISM Manufacturing data printed slightly below expectations, which seemingly helped fuel bullish momentum.

The rally pressed forward with little resistance, reaching a high of 6963.50. Lunchtime brought profit-taking and bearish pressure, but afternoon support held firmly at Friday’s high despite repeated tests of that area. The regular session closed above the midpoint at 6943.75, up 43.25 handles.

Tuesday brings more news out of CES, along with December’s S&P final U.S. services PMI at 9:45 AM ET.

Among top index components, Tesla Inc (NASDAQ: TSLA) emerged as the biggest gainer. After December China sales data showed a year-over-year increase, the AI/EV leader rose $13.60 or 3.10% to close at $451.67.

That performance was a fortunate four times better than the cash index’s 0.67% advance.

Conversely, the biggest loser was Apple Inc (NASDAQ: AAPL). For the day, the tech giant fell $3.75 or 1.38% to close at $267.26.