SET Index (SET-BK)
Benchmark index · Thailand · data since 1996-12-11 · last close 2026-09-09
SET Index (SET-BK) monthly returns (%)
| Year | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2026 | 5.2 | 15.3 | -5.2 | 3.1 | 5.0 | 1.5 | 3.0 | -2.7 | 1.4 | · | · | · |
| 2025 | -6.1 | -8.4 | -3.8 | 3.4 | -4.0 | -5.2 | 14.0 | -0.5 | 3.0 | 2.8 | -4.0 | 0.2 |
| 2024 | -3.6 | 0.5 | 0.5 | -0.7 | -1.6 | -3.3 | 1.5 | 2.9 | 6.6 | 1.2 | -2.6 | -1.9 |
| 2023 | 0.2 | -2.9 | -0.8 | -5.0 | 0.3 | -2.0 | 3.5 | 0.6 | -6.0 | -6.1 | -0.1 | 2.6 |
| 2022 | -0.5 | 2.2 | 0.6 | -1.6 | -0.2 | -5.7 | 0.5 | 4.0 | -3.0 | 1.2 | 1.6 | 2.0 |
| 2021 | 1.2 | 2.0 | 6.0 | -0.3 | 0.7 | -0.4 | -4.2 | 7.7 | -2.0 | 1.1 | -3.4 | 5.7 |
| 2020 | -4.2 | -11.5 | -16.0 | 15.6 | 3.2 | -0.3 | -0.8 | -1.4 | -5.6 | -3.4 | 17.9 | 2.9 |
| 2019 | 5.0 | 0.7 | -0.9 | 2.1 | -3.2 | 6.8 | -1.1 | -3.3 | -1.1 | -2.2 | -0.7 | -0.7 |
| 2018 | 4.2 | 0.2 | -2.9 | 0.2 | -3.0 | -7.6 | 6.7 | 1.2 | 2.0 | -5.0 | -1.6 | -4.8 |
| 2017 | 2.2 | -1.1 | 1.0 | -0.6 | -0.3 | 0.8 | 0.1 | 2.5 | 3.5 | 2.9 | -1.4 | 3.3 |
| 2016 | 1.0 | 2.4 | 5.7 | -0.2 | 1.4 | 1.4 | 5.5 | 1.6 | -4.2 | 0.8 | 1.0 | 2.2 |
| 2015 | 5.6 | 0.4 | -5.1 | 1.4 | -2.0 | 0.6 | -4.3 | -4.0 | -2.4 | 3.4 | -2.5 | -5.3 |
| 2014 | -1.9 | 4.0 | 3.8 | 2.8 | 0.1 | 5.0 | 1.1 | 3.9 | 1.5 | -0.1 | 0.6 | -6.0 |
| 2013 | 5.9 | 4.6 | 1.3 | 2.4 | -2.2 | -7.0 | -2.0 | -9.1 | 6.9 | 4.3 | -5.0 | -5.3 |
| 2012 | 5.7 | 7.1 | 3.1 | 2.6 | -7.1 | 2.7 | 2.3 | 2.4 | 5.8 | 0.0 | 1.9 | 5.1 |
| 2011 | -6.7 | 2.5 | 6.0 | 4.4 | -1.8 | -3.0 | 8.8 | -5.6 | -14.4 | 6.4 | 2.1 | 3.0 |
| 2010 | -5.2 | 3.6 | 9.2 | -3.1 | -1.7 | 6.3 | 7.3 | 6.7 | 6.8 | 0.9 | 2.1 | 2.8 |
| 2009 | -2.7 | -1.4 | 0.0 | 13.9 | 14.0 | 6.6 | 4.4 | 4.7 | 9.8 | -4.4 | 0.6 | 6.6 |
| 2008 | -8.6 | 7.8 | -3.4 | 1.9 | 0.1 | -7.8 | -12.0 | 1.2 | -12.8 | -30.2 | -3.5 | 12.0 |
| 2007 | -3.8 | 3.5 | -0.5 | 3.8 | 5.5 | 5.3 | 10.7 | -5.4 | 4.0 | 7.3 | -6.7 | 1.4 |
| 2006 | 6.8 | -2.4 | -1.4 | 4.8 | -7.7 | -4.4 | 2.0 | -0.1 | -0.7 | 5.3 | 2.3 | -8.0 |
| 2005 | 5.1 | 5.7 | -8.1 | -3.3 | 1.3 | 1.2 | 0.0 | 3.3 | 3.6 | -5.6 | -2.2 | 6.9 |
| 2004 | -9.5 | 2.5 | -9.6 | 0.1 | -1.1 | 0.9 | -1.5 | -1.9 | 3.2 | -2.6 | 4.5 | 1.7 |
| 2003 | 3.8 | -2.4 | 0.9 | 2.8 | 7.8 | 14.4 | 4.8 | 11.1 | 7.7 | 10.4 | 1.0 | 19.5 |
| 2002 | 12.2 | 9.1 | 0.6 | -0.7 | 9.8 | -4.6 | -3.4 | -4.0 | -8.1 | 7.7 | 2.1 | -2.3 |
| 2001 | 23.6 | -2.3 | -10.2 | 3.0 | 3.2 | 4.0 | -7.7 | 12.7 | -17.4 | -0.7 | 10.0 | 0.4 |
| 2000 | -0.9 | -21.6 | 7.0 | -2.5 | -17.2 | 0.7 | -12.6 | 8.1 | -9.9 | -2.0 | 2.2 | -3.1 |
| 1999 | 2.0 | -6.1 | 3.3 | 30.5 | -1.3 | 15.0 | -12.4 | -3.6 | -11.5 | 1.6 | 6.7 | 14.2 |
| 1998 | 32.9 | 6.7 | -13.1 | -10.2 | -21.0 | -17.9 | -0.2 | -19.6 | 18.3 | 30.5 | 9.5 | -1.9 |
| 1997 | -5.2 | -7.7 | -3.0 | -6.3 | -14.3 | -6.9 | 26.2 | -24.6 | 8.4 | -17.9 | -11.6 | -5.8 |
| 1996 | · | · | · | · | · | · | · | · | · | · | · | -6.1 |
| Avg | 2.1 | 0.4 | -1.2 | 2.1 | -1.2 | -0.1 | 1.3 | -0.4 | -0.2 | 0.3 | 0.7 | 1.4 |
Values in %. Current and first-listed months are partial (greyed).
returnsview.com
SET-BK seasonality — average by calendar month
SET Index has monthly history back to 1996. Its strongest month by median is April — positive in 18 of 30 years, median +1.6%, and higher in 5 of the last 9. May is the soft spot, down in 17 of 30 with a median of -0.7%. Across its full record it has closed 55% of months higher, swings ±7.4% in an average month and has fallen 76.6% peak to trough.
| Month | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg | +2.1% | +0.4% | -1.2% | +2.1% | -1.3% | -0.1% | +1.4% | -0.4% | -0.3% | +0.3% | +0.7% | +1.4% |
| Win rate | 57%/30 | 63%/30 | 47%/30 | 60%/30 | 43%/30 | 53%/30 | 60%/30 | 53%/30 | 52%/29 | 59%/29 | 55%/29 | 60%/30 |
Win rate = share of positive months / sample size.
SET-BK risk & extremes
SET-BK drawdown & rolling returns
Percent below the all-time high at each month-end — how far underwater the asset was.
Frequently asked questions
What was SET Index's best month?+
SET Index's strongest completed month on record is January 1998, at +32.88%.
What was SET Index's worst month?+
Its weakest completed month on record is October 2008, at -30.18%.
Is SET Index up this year?+
SET Index is up 28.44% year to date, measured from its last close before 1 January.
What is SET Index's 1-year return?+
+26.79% over the past twelve months, comparing the latest close with the most recent close on or before the same date a year earlier.
What is SET Index's biggest drawdown?+
The deepest peak-to-trough fall on record is 76.6%, measured on month-end closes since 1996.
Which calendar month is historically best for SET Index?+
April has the highest average return across every completed April since 1996. An average is not a forecast.
About SET Index
SET Index isn't a company — it's the scoreboard: Thailand's benchmark index, tracked here like any other asset, because sometimes the market itself is the most interesting ticker — with price history on this site back to 1996. Since 1996 it has ground out +92% overall — not every story is a rocket.
Did you know?
- Its best month on record was January 1998 at +32.88%; its worst, October 2008 at -30.18%.
Trivia for entertainment — the numbers come from our price data; the jokes don't.