Largest Negative Opening Gaps for ABM

How does ABM usually behave after a large gap-down move?

Using the 12 largest gap-down moves over the last 3 years in ABM stock, the average move was -2.5% with the single largest opening gap of -3.5% occurring on 7-Apr-2025. Following the opening, ABM tended to drift lower to the closing price 58% of the time for an average loss of -0.3%. The following day, ABM stock price averaged -1.7% losses, with down moves exceeding up moves. The stock was down 83% of the time in that period one day after these significant gaps. Earnings dates have been excluded from this analysis.

Catalysts

7 of ABM's 12 largest moves corresponded with a large gap down in the overall market. 3 of the moves coincided with a company-issued press release.

Open-to-High and Open-to-Low

The largest percentage gain from the open to the high of the day was +5.1% on 8-Sep-2023, while the biggest drop from the open to the low was -10.5% on 18-Dec-2025. On average, the ABM stock price gain from the opening price to the highest point of the day was +2.0%, and the average drop to the lowest point was -2.4%.

Day Drift Open-to-Close

The best performance in ABM stock price from opening price to closing price (referred to as the "drift" for the day) was on 8-Sep-2023 for a +4.4% gain after the stock gapped down -2.8% at the open. The worst worst return from the opening price to the closing price was on 18-Dec-2025 when the stock lost -7.7% after the stock gapped down -2.4%. Overall in the 12 available observations, the stock drifted lower 58% of the time for an average loss of -0.3%.