Does LyondellBasell (LYB) stock go up or down depending on the month?
LyondellBasell month by month, year by year
| Year | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2026 | +13.2% | +17.4% | +40.1% | -7.4% | -10.7% | -21.0% | +17.9% | |||||
| 2025 | +1.9% | +1.5% | -8.4% | -17.3% | -3.0% | +2.4% | +0.1% | -2.7% | -13.0% | -5.3% | +5.5% | -11.6% |
| 2024 | -1.0% | +6.5% | +2.0% | -2.3% | -0.6% | -3.8% | +4.0% | -0.8% | -2.8% | -9.4% | -4.0% | -10.9% |
| 2023 | +16.5% | -0.7% | -2.2% | +0.8% | -9.6% | +7.4% | +7.7% | -0.1% | -4.1% | -4.7% | +5.4% | -0.0% |
| 2022 | +4.9% | +0.5% | +5.7% | +3.1% | +7.8% | -23.4% | +1.9% | -6.9% | -9.3% | +1.6% | +11.2% | -2.3% |
| 2021 | -6.4% | +20.2% | +0.9% | -0.3% | +8.6% | -8.7% | -3.4% | +1.0% | -6.5% | -1.1% | -6.1% | +5.9% |
| 2020 | -17.6% | -8.2% | -30.5% | +16.8% | +10.0% | +3.1% | -4.9% | +4.7% | +7.7% | -2.9% | +24.3% | +7.7% |
| 2019 | +4.6% | -1.7% | -1.7% | +4.9% | -15.8% | +16.0% | -2.8% | -7.5% | +15.6% | +0.3% | +3.2% | +2.1% |
| 2018 | +8.6% | -9.7% | -2.3% | +0.0% | +6.0% | -2.0% | +0.9% | +1.8% | -9.1% | -12.9% | +4.5% | -10.9% |
| 2017 | +8.7% | -2.2% | -0.1% | -7.1% | -5.0% | +4.8% | +6.8% | +0.6% | +9.3% | +4.5% | +1.1% | +5.4% |
| 2016 | -10.3% | +2.9% | +6.7% | -3.4% | -1.6% | -8.5% | +1.1% | +4.8% | +2.2% | -1.4% | +13.5% | -5.0% |
| 2015 | -0.4% | +8.6% | +2.2% | +17.9% | -2.3% | +2.4% | -9.4% | -9.0% | -2.4% | +11.5% | +3.1% | -9.3% |
| 2014 | -1.9% | +11.8% | +1.0% | +4.0% | +7.6% | -1.9% | +8.8% | +7.6% | -5.0% | -15.7% | -13.9% | +0.7% |
| 2013 | -7.6% | +8.0% | -4.1% | +9.8% | -0.6% | +3.7% | +2.1% | +4.4% | +1.9% | +3.5% | +4.0% | |
| Average | +1.6% | +2.8% | +1.5% | +0.4% | +0.1% | -2.4% | +2.3% | -0.3% | -1.0% | -2.6% | +3.9% | -1.9% |
| % of years up | 54% | 57% | 57% | 50% | 43% | 43% | 71% | 54% | 38% | 38% | 77% | 46% |
| Years observed | 13 | 14 | 14 | 14 | 14 | 14 | 14 | 13 | 13 | 13 | 13 | 13 |
LyondellBasell month by month: the summary
Over 2013-2026, here's what LyondellBasell (LYB) stock did each month, on average: January +1.6% (up 54% of 13 years), February +2.8% (up 57% of 14 years), March +1.5% (up 57% of 14 years), April +0.4% (up 50% of 14 years), May +0.1% (up 43% of 14 years), June -2.4% (up 43% of 14 years), July +2.3% (up 71% of 14 years), August -0.3% (up 54% of 13 years), September -1.0% (up 38% of 13 years), October -2.6% (up 38% of 13 years), November +3.9% (up 77% of 13 years), December -1.9% (up 46% of 13 years). In other words, LYB historically rose in January, February, March, April, May, July, November, and fell in June, August, September, October, December.
Does LyondellBasell really go up in November?
Over 2013-2026, November is LyondellBasell's strongest month: +3.9% on average, positive in 10 of 13 years. At the other end, October shows -2.6%. 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 LyondellBasell stock go up or down in August?
Over 13 years, LYB fell -0.3% on average in August, finishing the month up 7 times out of 13 (54%). Median: +0.6%. Results are split year to year — there's no clear pattern. ⚠️ 13 years of data is not a prediction.
Does LyondellBasell stock go up or down in February?
Over 14 years, LYB rose +2.8% on average in February, finishing the month up 8 times out of 14 (57%). Median: +1.0%. Results are split year to year — there's no clear pattern. ⚠️ 14 years of data is not a prediction.
Does LyondellBasell stock go up or down in June?
Over 14 years, LYB fell -2.4% on average in June, finishing the month up 6 times out of 14 (43%). Median: -1.3%. Results are split year to year — there's no clear pattern. ⚠️ 14 years of data is not a prediction.
Does LyondellBasell stock go up or down in July?
Over 14 years, LYB rose +2.3% on average in July, 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 LyondellBasell stock go up or down in December?
Over 13 years, LYB fell -1.9% on average in December, finishing the month up 6 times out of 13 (46%). Median: -0.0%. Results are split year to year — there's no clear pattern. ⚠️ 13 years of data is not a prediction.
Does LyondellBasell stock go up or down in January?
Over 13 years, LYB rose +1.6% on average in January, finishing the month up 7 times out of 13 (54%). Median: +1.9%. Results are split year to year — there's no clear pattern. ⚠️ 13 years of data is not a prediction.
What is the best month to buy LyondellBasell stock?
Historically, November: over the last 14 years, LYB gained +3.9% on average that month and finished up 77% of the time (13 years observed). October is the weakest month (-2.6%). This is not a prediction: 14 years is a small sample, and the past is under no obligation to repeat.
Why does LyondellBasell stock often rise in November?
November has averaged as its best month over 14 years (+3.9%, 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 LYB it's November (+3.9% 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 LYB, 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 LYB'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.