TWSE · 6838 · stock
Formosa Pharmaceuticals, Inc. (6838) stock price history
Every TWSE trading session of Formosa Pharmaceuticals, Inc. from Oct 7, 2021 to Nov 13, 2026: 1,236 daily bars, adjusted for splits and dividends, with minute bars from Sep 15, 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.
6838 adjusted close, 2021 to 2026
- NT$65.38
- All time high, 2022
- NT$33.30
- 52 week high, NT$19.80 low
- 1,236
- Daily sessions since 2021
Last updated Nov 13, 2026, the last stored session. Refreshes after each trading day. Full 2021 to 2026 series and minute bars.
6838 key facts
- Formosa Pharmaceuticals, Inc. (6838) closed at NT$20.75 on Nov 13, 2026 on TWSE.
- 6838's all time high close is NT$65.38, set on Aug 22, 2022; its all time low close is NT$20.05 on Nov 12, 2026.
- 6838's 52 week range is NT$19.80 to NT$33.30.
- 6838 returned -24.4% over the year to Nov 13, 2026 and -27.2% over five years.
- Since Oct 7, 2021 6838 returned -62%, -17.1% a year compounded.
- 6838's deepest drawdown was -69.3% from Aug 22, 2022 to Nov 12, 2026.
- DataCedar holds 1,236 daily sessions of 6838 history from Oct 7, 2021 and minute bars from Sep 15, 2026, adjusted for splits and dividends, served by the API under a key.
6838 price chart, 2021 to 2026
6838 returns
Price return from the last close on or before the window start to Nov 13, 2026, on adjusted closes.
| Period | Return |
|---|---|
| 1 month | -17.0% |
| 3 months | -10.0% |
| 6 months | -21.3% |
| Year to date | -21.7% |
| 1 year | -24.4% |
| 3 years | -58.7% |
| 5 years | -27.2% |
| 10 years | n/a |
| Since Oct 7, 2021 | -61.7% |
| Compound annual growth, 5.1 years | -17.1% |
6838 records
Measured on the stored closes; every figure is reproducible from the API series.
- All time high close
- NT$65.38 on Aug 22, 2022
- All time low close
- NT$20.05 on Nov 12, 2026
- 52 week high
- NT$33.30 on Apr 8, 2026
- 52 week low
- NT$19.80 on Nov 12, 2026
- Deepest drawdown
- -69.3% from Aug 22, 2022 to Nov 12, 2026, not yet recovered
- Best single session
- +28.8% on Aug 10, 2022
- Worst single session
- -23.5% on Oct 8, 2021
- Volatility, 1 year annualised
- 33.5%
- Sessions closing higher, 1 year
- 38%
- Best calendar year
- 2022, +52%
- Worst calendar year
- 2025, -30%
6838 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. 2021 starts on Oct 7, 2021; 2026 runs to Nov 13, 2026.
| Year | Open | High | Low | Close | Return | Volume | Sessions |
|---|---|---|---|---|---|---|---|
| 2026 | NT$26.60 | NT$33.30 | NT$19.80 | NT$20.75 | -21.4% | 47.2M | 207 |
| 2025 | NT$37.50 | NT$43.45 | NT$21.55 | NT$26.40 | -29.5% | 196.5M | 242 |
| 2024 | NT$49.80 | NT$66.90 | NT$36.90 | NT$37.45 | -25.1% | 115.3M | 242 |
| 2023 | NT$50.32 | NT$67.71 | NT$49.00 | NT$50.00 | -1.8% | 92.5M | 239 |
| 2022 | NT$32.75 | NT$68.00 | NT$32.45 | NT$50.90 | +51.9% | 130.4M | 246 |
| 2021 | NT$36.60 | NT$58.76 | NT$27.93 | NT$33.52 | n/a | 10.6M | 60 |
6838 monthly closes, last 12 months
| Month | Month end close | Change |
|---|---|---|
| November 2026 | NT$20.75 | -15.7% |
| October 2026 | NT$24.60 | -4.7% |
| September 2026 | NT$25.80 | +12.2% |
| August 2026 | NT$23.00 | -1.9% |
| July 2026 | NT$23.45 | -3.7% |
| June 2026 | NT$24.35 | -2.2% |
| May 2026 | NT$24.90 | -10.8% |
| April 2026 | NT$27.90 | -0.4% |
| March 2026 | NT$28.00 | -0.5% |
| February 2026 | NT$28.15 | -0.9% |
| January 2026 | NT$28.40 | +7.6% |
| December 2025 | NT$26.40 | -4.3% |
About the 6838 data
Daily bars. 1,236 sessions from Oct 7, 2021 to Nov 13, 2026, one row per TWSE 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 15, 2026 forward, most recent session Nov 10, 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 TWSE trading days; minute timestamps are UTC. Prices are in TWD. 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 Oct 7, 2021, 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/twse%3A6838/bars?timeframe=1Day&adjustment=all&limit=50000" \
-H "X-API-Key: YOUR_KEY"Nearby on TWSE
Common questions
6838 share price history
