SET · SIAM-R · stock

Siam Steel International Public Company Limited (SIAM-R) stock price history

Every SET trading session of Siam Steel International Public Company Limited from Dec 28, 2007 to Sep 28, 2026: 3,543 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.

Get SIAM-R data, free keyYear by year table

SIAM-R adjusted close, 2007 to 2026

SIAM-RSiam Steel International Public Company
THB 0.9500+25.0% over one year
2010201520202025
THB 3.10
All time high, 2008
THB 1.00
52 week high, THB 0.6500 low
3,543
Daily sessions since 2007

Last updated Sep 28, 2026, the last stored session. Refreshes after each trading day. Full 2007 to 2026 series and minute bars.

SIAM-R key facts

  • Siam Steel International Public Company Limited (SIAM-R) closed at THB 0.9500 on Sep 28, 2026 on SET.
  • SIAM-R's all time high close is THB 3.10, set on May 2, 2008; its all time low close is THB 0.6500 on Mar 13, 2026.
  • SIAM-R's 52 week range is THB 0.6500 to THB 1.00.
  • SIAM-R returned +25.0% over the year to Sep 28, 2026 and -51.9% over five years.
  • Over ten years SIAM-R returned -41%, -5.1% a year compounded.
  • SIAM-R's deepest drawdown was -79.0% from May 2, 2008 to Mar 13, 2026.
  • DataCedar holds 3,543 daily sessions of SIAM-R history from Dec 28, 2007 and minute bars from Sep 17, 2026, adjusted for splits and dividends, served by the API under a key.

SIAM-R price chart, 2007 to 2026

SIAM-R adjusted close, Dec 28, 2007 to Sep 28, 2026THB 0.6500THB 1.39THB 2.14THB 2.882010201520202025
Adjusted daily close. 260 sampled points across the full history; the API serves every session.

SIAM-R returns

Price return from the last close on or before the window start to Sep 28, 2026, on adjusted closes.

PeriodReturn
1 month+46.2%
3 months+46.2%
6 months+46.2%
Year to date+25.0%
1 year+25.0%
3 years-34.9%
5 years-51.9%
10 years-40.6%
Since Dec 28, 2007-65.2%
Compound annual growth, 18.8 years-5.5%

SIAM-R records

Measured on the stored closes; every figure is reproducible from the API series.

All time high close
THB 3.10 on May 2, 2008
All time low close
THB 0.6500 on Mar 13, 2026
52 week high
THB 1.00 on Sep 3, 2026
52 week low
THB 0.6500 on Mar 13, 2026
Deepest drawdown
-79.0% from May 2, 2008 to Mar 13, 2026, not yet recovered
Best single session
+60.5% on Apr 7, 2017
Worst single session
-27.9% on Dec 18, 2024
Volatility, 1 year annualised
46.2%
Sessions closing higher, 1 year
1%
Best calendar year
2021, +44%
Worst calendar year
2008, -49%

SIAM-R 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. 2007 starts on Dec 28, 2007; 2026 runs to Sep 28, 2026.

YearOpenHighLowCloseReturnVolumeSessions
2026THB 0.7600THB 1.00THB 0.6500THB 0.9500+25.0%43.5K186
2025THB 1.06THB 1.06THB 0.7000THB 0.7600-28.3%11.4K242
2024THB 1.46THB 1.47THB 1.06THB 1.06-27.4%5K243
2023THB 1.85THB 1.93THB 1.46THB 1.46-21.0%1.3M243
2022THB 1.86THB 2.16THB 1.40THB 1.85-0.6%6.2M241
2021THB 1.29THB 2.66THB 1.23THB 1.86+44.1%19.6M241
2020THB 1.56THB 1.56THB 1.04THB 1.29-17.2%337.3K243
2019THB 1.88THB 2.39THB 1.56THB 1.56-17.1%5.9M244
2018THB 2.09THB 2.35THB 1.64THB 1.88-10.0%3.4M245
2017THB 2.57THB 2.63THB 2.00THB 2.09+30.4%145K178
2013THB 1.60THB 1.60THB 1.60THB 1.600.0%011
2012THB 1.43THB 1.60THB 1.43THB 1.60+12.0%0245
2011THB 1.30THB 1.43THB 1.30THB 1.43+9.9%0244
2010THB 1.28THB 1.30THB 1.28THB 1.30+1.1%0244
2009THB 1.38THB 1.42THB 0.7876THB 1.28-7.1%911.7M245
2008THB 2.71THB 3.30THB 1.01THB 1.38-49.3%833.9M247
2007THB 2.72THB 2.78THB 2.73THB 2.73n/a436.3K1

SIAM-R monthly closes, last 12 months

MonthMonth end closeChange
September 2026THB 0.9500+46.2%
August 2026THB 0.65000.0%
July 2026THB 0.65000.0%
June 2026THB 0.65000.0%
May 2026THB 0.65000.0%
April 2026THB 0.65000.0%
March 2026THB 0.6500-14.5%
February 2026THB 0.76000.0%
January 2026THB 0.76000.0%
December 2025THB 0.76000.0%
November 2025THB 0.76000.0%
October 2025THB 0.76000.0%

About the SIAM-R data

Daily bars. 3,543 sessions from Dec 28, 2007 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 Dec 28, 2007, 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-R/bars?timeframe=1Day&adjustment=all&limit=50000" \
  -H "X-API-Key: YOUR_KEY"

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