TWSE · 6838 · stock
Formosa Pharmaceuticals, Inc. (6838) stock price history
Every TWSE trading session of Formosa Pharmaceuticals, Inc. from Oct 7, 2021 to Sep 24, 2026: 1,207 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$22.35 low
- 1,207
- Daily sessions since 2021
Last updated Sep 24, 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$25.50 on Sep 24, 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$21.55 on Apr 9, 2025.
- 6838's 52 week range is NT$22.35 to NT$33.30.
- 6838 returned -16.4% over the year to Sep 24, 2026.
- Since Oct 7, 2021 6838 returned -53%, -14.1% a year compounded.
- 6838's deepest drawdown was -67.0% from Aug 22, 2022 to Apr 9, 2025.
- DataCedar holds 1,207 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 Sep 24, 2026, on adjusted closes.
| Period | Return |
|---|---|
| 1 month | +10.4% |
| 3 months | +6.9% |
| 6 months | -1.4% |
| Year to date | -3.8% |
| 1 year | -16.4% |
| 3 years | -50.9% |
| 5 years | n/a |
| 10 years | n/a |
| Since Oct 7, 2021 | -52.9% |
| Compound annual growth, 5.0 years | -14.1% |
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$21.55 on Apr 9, 2025
- 52 week high
- NT$33.30 on Apr 8, 2026
- 52 week low
- NT$22.35 on Aug 19, 2026
- Deepest drawdown
- -67.0% from Aug 22, 2022 to Apr 9, 2025, 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
- 32.6%
- Sessions closing higher, 1 year
- 40%
- 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 Sep 24, 2026.
| Year | Open | High | Low | Close | Return | Volume | Sessions |
|---|---|---|---|---|---|---|---|
| 2026 | NT$26.60 | NT$33.30 | NT$22.35 | NT$25.50 | -3.4% | 43.2M | 178 |
| 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 |
|---|---|---|
| September 2026 | NT$25.50 | +10.9% |
| 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% |
| November 2025 | NT$27.60 | -1.8% |
| October 2025 | NT$28.10 | -8.2% |
About the 6838 data
Daily bars. 1,207 sessions from Oct 7, 2021 to Sep 24, 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 Sep 24, 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/6838/bars?timeframe=1Day&adjustment=all&limit=50000" \
-H "X-API-Key: YOUR_KEY"Nearby on TWSE
Common questions
6838 share price history
