SET · SIAM · stock
Siam Steel International Public Company Limited (SIAM) stock price history
Every SET trading session of Siam Steel International Public Company Limited from May 15, 2000 to Sep 28, 2026: 6,533 daily bars, adjusted for splits and dividends, with minute bars from Sep 17, 2026 forward. The full series is served by the API: a free key covers the last year, paid plans the whole history and minute bars.
SIAM adjusted close, 2000 to 2026
- THB 7.55
- All time high, 2003
- THB 1.26
- 52 week high, THB 0.6100 low
- 6,533
- Daily sessions since 2000
Last updated Sep 28, 2026, the last stored session. Refreshes after each trading day. Full 2000 to 2026 series and minute bars.
SIAM key facts
- Siam Steel International Public Company Limited (SIAM) closed at THB 0.9000 on Sep 28, 2026 on SET.
- SIAM's all time high close is THB 7.55, set on Nov 7, 2003; its all time low close is THB 0.6100 on Jan 30, 2026.
- SIAM's 52 week range is THB 0.6100 to THB 1.26.
- SIAM returned -16.7% over the year to Sep 28, 2026 and -53.0% over five years.
- Over ten years SIAM returned -61%, -8.9% a year compounded.
- SIAM's deepest drawdown was -91.9% from Nov 7, 2003 to Jan 30, 2026.
- DataCedar holds 6,533 daily sessions of SIAM history from May 15, 2000 and minute bars from Sep 17, 2026, adjusted for splits and dividends, served by the API under a key.
SIAM price chart, 2000 to 2026
SIAM returns
Price return from the last close on or before the window start to Sep 28, 2026, on adjusted closes.
| Period | Return |
|---|---|
| 1 month | -7.2% |
| 3 months | +20.0% |
| 6 months | +34.3% |
| Year to date | +25.0% |
| 1 year | -16.7% |
| 3 years | -37.9% |
| 5 years | -53.0% |
| 10 years | -60.5% |
| Since May 15, 2000 | -80.6% |
| Compound annual growth, 26.4 years | -6.0% |
SIAM records
Measured on the stored closes; every figure is reproducible from the API series.
- All time high close
- THB 7.55 on Nov 7, 2003
- All time low close
- THB 0.6100 on Jan 30, 2026
- 52 week high
- THB 1.26 on Sep 29, 2025
- 52 week low
- THB 0.6100 on Jan 30, 2026
- Deepest drawdown
- -91.9% from Nov 7, 2003 to Jan 30, 2026, not yet recovered
- Best single session
- +30.7% on Aug 25, 2026
- Worst single session
- -43.7% on Jun 5, 2000
- Volatility, 1 year annualised
- 55.1%
- Sessions closing higher, 1 year
- 31%
- Best calendar year
- 2003, +205%
- Worst calendar year
- 2004, -55%
SIAM price history by year
Open is the first session's open, high and low span the year, close is the last session's close, and the return is close over the previous year's close. 2000 starts on May 15, 2000; 2026 runs to Sep 28, 2026.
| Year | Open | High | Low | Close | Return | Volume | Sessions |
|---|---|---|---|---|---|---|---|
| 2026 | THB 0.7100 | THB 1.12 | THB 0.6100 | THB 0.9000 | +25.0% | 70.7M | 186 |
| 2025 | THB 1.02 | THB 1.26 | THB 0.6200 | THB 0.7200 | -29.4% | 35.8M | 242 |
| 2024 | THB 1.38 | THB 1.46 | THB 0.9700 | THB 1.02 | -26.6% | 26.6M | 243 |
| 2023 | THB 1.83 | THB 1.95 | THB 1.31 | THB 1.39 | -23.7% | 71.9M | 243 |
| 2022 | THB 1.89 | THB 2.22 | THB 1.39 | THB 1.82 | -3.6% | 341.4M | 241 |
| 2021 | THB 1.28 | THB 2.67 | THB 1.23 | THB 1.89 | +44.3% | 519.3M | 241 |
| 2020 | THB 1.61 | THB 1.61 | THB 1.02 | THB 1.31 | -17.6% | 83.6M | 243 |
| 2019 | THB 1.90 | THB 2.45 | THB 1.50 | THB 1.59 | -17.2% | 147.4M | 244 |
| 2018 | THB 2.12 | THB 2.35 | THB 1.60 | THB 1.92 | -10.6% | 164.8M | 245 |
| 2017 | THB 2.51 | THB 3.06 | THB 2.00 | THB 2.14 | -14.2% | 191.9M | 242 |
| 2016 | THB 2.76 | THB 2.90 | THB 1.88 | THB 2.50 | -9.4% | 348.5M | 244 |
| 2015 | THB 2.05 | THB 4.18 | THB 2.02 | THB 2.76 | +36.6% | 1.9B | 244 |
| 2014 | THB 2.07 | THB 2.81 | THB 1.80 | THB 2.02 | -4.3% | 319.2M | 245 |
| 2013 | THB 2.79 | THB 2.94 | THB 1.76 | THB 2.11 | -24.5% | 233.5M | 245 |
| 2012 | THB 2.73 | THB 3.98 | THB 2.54 | THB 2.79 | +3.8% | 566.7M | 245 |
| 2011 | THB 2.32 | THB 2.98 | THB 1.87 | THB 2.69 | +16.7% | 798.3M | 244 |
| 2010 | THB 1.88 | THB 2.89 | THB 1.46 | THB 2.31 | +23.0% | 1.2B | 244 |
| 2009 | THB 1.46 | THB 2.10 | THB 0.8751 | THB 1.88 | +28.6% | 2.3B | 245 |
| 2008 | THB 3.02 | THB 3.66 | THB 1.13 | THB 1.46 | -51.9% | 1.1B | 247 |
| 2007 | THB 3.58 | THB 3.97 | THB 2.35 | THB 3.03 | -20.9% | 583.6M | 246 |
| 2006 | THB 1.29 | THB 5.02 | THB 1.27 | THB 3.83 | +201.2% | 2.3B | 259 |
| 2005 | THB 1.79 | THB 3.26 | THB 1.16 | THB 1.27 | -28.6% | 737.4M | 245 |
| 2004 | THB 3.94 | THB 4.84 | THB 1.33 | THB 1.78 | -54.8% | 139.6M | 262 |
| 2003 | THB 1.29 | THB 8.00 | THB 1.11 | THB 3.94 | +205.0% | 767.3M | 261 |
| 2002 | THB 1.72 | THB 2.88 | THB 0.9679 | THB 1.29 | -24.8% | 89.7M | 261 |
| 2001 | THB 1.03 | THB 4.13 | THB 0.9679 | THB 1.72 | +66.2% | 48.9M | 261 |
| 2000 | THB 9.84 | THB 9.84 | THB 0.8388 | THB 1.03 | n/a | 11.3M | 165 |
SIAM monthly closes, last 12 months
| Month | Month end close | Change |
|---|---|---|
| September 2026 | THB 0.9000 | -8.2% |
| August 2026 | THB 0.9800 | +25.6% |
| July 2026 | THB 0.7800 | +2.6% |
| June 2026 | THB 0.7600 | +1.3% |
| May 2026 | THB 0.7500 | +10.3% |
| April 2026 | THB 0.6800 | -1.4% |
| March 2026 | THB 0.6900 | -2.8% |
| February 2026 | THB 0.7100 | +16.4% |
| January 2026 | THB 0.6100 | -15.3% |
| December 2025 | THB 0.7200 | +2.9% |
| November 2025 | THB 0.7000 | -13.6% |
| October 2025 | THB 0.8100 | -12.9% |
About the SIAM data
Daily bars. 6,533 sessions from May 15, 2000 to Sep 28, 2026, one row per SET trading day with open, high, low, close and volume. Prices are adjusted for splits and cash dividends so the series is comparable across its whole length; the API also serves the raw, split only and dividend only views.
Minute bars. Stored from Sep 17, 2026 forward, most recent session Sep 29, 2026. Minute history is captured from the day collection began and is never backfilled, so this start date is exact. Five minute, fifteen minute and hourly bars are derived from these minutes.
Time and currency. Session dates are SET trading days; minute timestamps are UTC. Prices are in THB. Volume is shares traded on the session.
Get the data. The REST endpoint returns the daily series as JSON with pagination; a free key serves the last year, Quant and above the full history back to May 15, 2000, and minute bars come with the paid windows. It takes timeframe (1Min, 5Min, 15Min, 1Hour, 1Day), adjustment, start and end. See the bars endpoint and authentication, and pricing for the plan windows.
curl "https://api.datacedar.com/v3/stocks/SIAM/bars?timeframe=1Day&adjustment=all&limit=50000" \
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Common questions
SIAM share price history
