Monday’s S&P 500 index futures session started under bearish pressure but flipped into a classic buy-the-dip rally, ending the day at a new all-time closing high.

Sunday night trading opened weak after Fed Chair Jerome Powell’s statement referencing a DOJ probe seemed to spark sellers into action. Bids gave way until support held near Friday’s low, bottoming at 6950. From there, buyers steadily accumulated. The regular session still opened in the red, but bulls charged in aggressively to scoop up the discount.

Initial resistance near unchanged crumbled, turning into firm support by afternoon. The rally topped in the penultimate hour, reaching a new all-time high of 7025.25 before late profit-takers stepped in. The regular session closed at an all-time high of 7016.50, up 11.50 handles.

Tuesday brings December CPI data at 8:30 AM ET and several earnings before the open, including JPMorgan Chase & Co. (NYSE: JPM) at 6:32 AM ET.

Among top index components, Walmart Inc (NYSE: WMT) emerged as the biggest gainer. The retail giant climbed $3.44 or 3.00% to close at $117.97, carving out new all-time highs.

That performance was a mature 18 times better than the cash index’s 0.16% advance.

The biggest loser was Meta Platforms Inc (NASDAQ: META). For the day, the tech conglomerate fell $11.09 or 1.70% to close at $641.97.