Does Arthur J. Gallagher & Co. (AJG) stock go up or down depending on the month?
Arthur J. Gallagher & Co. month by month, year by year
| Year | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2026 | -3.6% | -8.5% | -5.1% | -4.7% | -2.6% | +14.2% | +8.6% | |||||
| 2025 | +6.3% | +11.9% | +2.2% | -7.1% | +8.3% | -7.9% | -10.3% | +5.4% | +2.3% | -19.5% | -0.7% | +4.5% |
| 2024 | +3.2% | +5.1% | +2.5% | -6.1% | +7.9% | +2.4% | +9.3% | +3.2% | -3.8% | -0.1% | +11.0% | -9.1% |
| 2023 | +3.8% | -4.3% | +2.1% | +8.8% | -3.7% | +9.6% | -2.2% | +7.3% | -1.1% | +3.3% | +5.7% | -9.7% |
| 2022 | -6.9% | +0.2% | +10.4% | -3.5% | -3.9% | +0.7% | +9.8% | +1.4% | -5.7% | +9.3% | +6.4% | -5.3% |
| 2021 | -6.7% | +3.8% | +4.1% | +16.2% | +1.1% | -4.5% | -0.5% | +3.1% | +3.5% | +12.8% | -2.8% | +4.2% |
| 2020 | +7.7% | -5.0% | -16.4% | -3.7% | +20.1% | +3.4% | +10.3% | -2.0% | +0.3% | -1.8% | +11.3% | +7.2% |
| 2019 | +1.4% | +7.5% | -2.7% | +7.1% | +0.7% | +4.0% | +3.2% | +0.3% | -1.3% | +1.8% | +2.2% | +2.1% |
| 2018 | +8.0% | +1.2% | -0.5% | +1.8% | -5.3% | -1.5% | +9.3% | +1.1% | +3.2% | -0.6% | +4.1% | -4.4% |
| 2017 | +3.6% | +5.8% | -0.7% | -1.3% | +1.6% | +0.9% | +2.7% | -1.5% | +6.3% | +2.9% | +3.9% | -3.9% |
| 2016 | -8.1% | +5.9% | +11.6% | +3.5% | +5.0% | -1.5% | +3.3% | +0.4% | +3.0% | -5.2% | +4.4% | +3.2% |
| 2015 | -5.6% | +5.8% | -0.5% | +2.3% | +1.3% | -2.4% | +0.3% | -7.8% | -5.6% | +5.9% | +0.0% | -6.4% |
| 2014 | -1.5% | -0.1% | +3.0% | -5.4% | +1.8% | +1.7% | -3.4% | +5.0% | -4.0% | +5.2% | +0.5% | -1.8% |
| 2013 | +4.1% | +7.4% | +2.8% | +2.9% | +0.0% | +1.6% | -6.8% | +5.6% | +8.7% | -1.9% | +0.8% | |
| Average | +0.1% | +2.4% | +1.2% | +0.8% | +2.5% | +1.4% | +3.0% | +0.7% | +0.2% | +1.8% | +3.4% | -1.4% |
| % of years up | 54% | 71% | 57% | 50% | 71% | 64% | 71% | 69% | 54% | 62% | 77% | 46% |
| Years observed | 13 | 14 | 14 | 14 | 14 | 14 | 14 | 13 | 13 | 13 | 13 | 13 |
Arthur J. Gallagher & Co. month by month: the summary
Over 2013-2026, here's what Arthur J. Gallagher & Co. (AJG) stock did each month, on average: January +0.1% (up 54% of 13 years), February +2.4% (up 71% of 14 years), March +1.2% (up 57% of 14 years), April +0.8% (up 50% of 14 years), May +2.5% (up 71% of 14 years), June +1.4% (up 64% of 14 years), July +3.0% (up 71% of 14 years), August +0.7% (up 69% of 13 years), September +0.2% (up 54% of 13 years), October +1.8% (up 62% of 13 years), November +3.4% (up 77% of 13 years), December -1.4% (up 46% of 13 years). In other words, AJG historically rose in January, February, March, April, May, June, July, August, September, October, November, and fell in December.
Does Arthur J. Gallagher & Co. really go up in November?
Over 2013-2026, November is Arthur J. Gallagher & Co.'s strongest month: +3.4% on average, positive in 10 of 13 years. At the other end, December shows -1.4%. But a monthly gap is often built on one or two extreme years — the table above shows it: look at the spread, not just the average. Seasonality only means something when it has a cause (selling season, earnings calendar, year-end tax effects); with no identified cause, it's probably noise.
Frequently asked questions
Does Arthur J. Gallagher & Co. stock go up or down in August?
Over 13 years, AJG rose +0.7% on average in August, finishing the month up 9 times out of 13 (69%). Median: +1.1%. Results are split year to year — there's no clear pattern. ⚠️ 13 years of data is not a prediction.
Does Arthur J. Gallagher & Co. stock go up or down in July?
Over 14 years, AJG rose +3.0% on average in July, finishing the month up 10 times out of 14 (71%). Median: +3.0%. It's one of its most consistent months. ⚠️ 14 years of data is not a prediction.
Does Arthur J. Gallagher & Co. stock go up or down in May?
Over 14 years, AJG rose +2.5% on average in May, finishing the month up 10 times out of 14 (71%). Median: +1.5%. It's one of its most consistent months. ⚠️ 14 years of data is not a prediction.
Does Arthur J. Gallagher & Co. stock go up or down in February?
Over 14 years, AJG rose +2.4% on average in February, finishing the month up 10 times out of 14 (71%). Median: +4.0%. It's one of its most consistent months. ⚠️ 14 years of data is not a prediction.
Does Arthur J. Gallagher & Co. stock go up or down in October?
Over 13 years, AJG rose +1.8% on average in October, finishing the month up 8 times out of 13 (62%). Median: +2.9%. Results are split year to year — there's no clear pattern. ⚠️ 13 years of data is not a prediction.
Does Arthur J. Gallagher & Co. stock go up or down in June?
Over 14 years, AJG rose +1.4% on average in June, finishing the month up 9 times out of 14 (64%). Median: +0.8%. Results are split year to year — there's no clear pattern. ⚠️ 14 years of data is not a prediction.
What is the best month to buy Arthur J. Gallagher & Co. stock?
Historically, November: over the last 14 years, AJG gained +3.4% on average that month and finished up 77% of the time (13 years observed). December is the weakest month (-1.4%). This is not a prediction: 14 years is a small sample, and the past is under no obligation to repeat.
Why does Arthur J. Gallagher & Co. stock often rise in November?
November has averaged as its best month over 14 years (+3.4%, up 77% of years). No clearly established recurring seasonal driver explains this month — it's a statistical tendency over 14 years of history, not a prediction.
Is there a best month to invest in the stock market in general?
There's no universal rule: every stock has its own seasonality. For AJG it's November (+3.4% on average over 14 years) — another stock will look completely different. The calendar effects people cite ("sell in May", the year-end rally) are market-wide averages, not laws: on AJG, November is the most consistent month (77% positive years). We also rank all 12 months for the whole market.
Does stock seasonality actually work?
Careful. A month that rose 14 times out of 14 can simply be chance: with 12 months and a dozen years, patterns appear naturally even in random data. Seasonality describes what happened; it doesn't explain why and predicts nothing. Treat it as context, never as a standalone buy signal.
What data is this table based on?
On AJG's real monthly closing prices from 2013 to 2026 (14 years), source Yahoo Finance. Each cell = the price change over that month. Price performance, excluding dividends. Incomplete months and quote gaps are excluded.