This website incorporates forecasting skills from BUA 345 - Business Analytics into a dashboard presentation format.
Last Update:
Monday, April 20, 2026
Opening Value:
369.22
Highest Value:
370.07
Lowest Value:
364.25
Adj. Closing Value:
366.24
- The forecast plot shows the forecasted Taiwan Semiconductor Manufacturing stock prices for the next 12 months.
- The plot also shows the 80% prediction interval in dark purple and the 95% prediction interval in light purple.
- The numeric values for these forecasted values and prediction intervals are shown in the next tab.
The table below shows the forecast values and 80% and 95% prediction intervals for the 12 requested forecasts for the Taiwan Semiconductor Manufacturing stock.
| Point Forecast | Lo 80 | Hi 80 | Lo 95 | Hi 95 | |
|---|---|---|---|---|---|
| May 2026 | 349.7646 | 338.6912 | 360.8381 | 332.8293 | 366.7000 |
| Jun 2026 | 358.0393 | 341.8795 | 374.1990 | 333.3251 | 382.7535 |
| Jul 2026 | 366.3139 | 345.9051 | 386.7227 | 335.1014 | 397.5265 |
| Aug 2026 | 374.5885 | 350.3041 | 398.8730 | 337.4488 | 411.7283 |
| Sep 2026 | 382.8632 | 354.9034 | 410.8229 | 340.1025 | 425.6239 |
| Oct 2026 | 391.1378 | 359.6175 | 422.6582 | 342.9316 | 439.3440 |
| Nov 2026 | 399.4125 | 364.3974 | 434.4275 | 345.8615 | 452.9634 |
| Dec 2026 | 407.6871 | 369.2126 | 446.1616 | 348.8455 | 466.5287 |
| Jan 2027 | 415.9617 | 374.0429 | 457.8806 | 351.8524 | 480.0711 |
| Feb 2027 | 424.2364 | 378.8741 | 469.5987 | 354.8607 | 493.6120 |
| Mar 2027 | 432.5110 | 383.6961 | 481.3260 | 357.8550 | 507.1670 |
| Apr 2027 | 440.7857 | 388.5014 | 493.0699 | 360.8239 | 520.7475 |
- In March of 2027, the Taiwan Semiconductor Manufacturing stock price is forecasted to be 433 dollars.
- The width of the 80% prediction interval for this forecast in March of 2027 is 98 dollars.
These three residual plots allow the analyst to examine the distribution of the residuals of the modeled time series.
Despite increasing volatility, our stock price model is estimated to be 93.8% accurate.
This doesn’t guarantee that forecasts will be 93.8% accurate but it does improve our chances of accurate forecasting.
This dashboard was created using Quarto in RStudio, and the R Language and Environment.
The dataset used to create this dashboard was downloaded from Yahoo Finance.
Arnold J (2024). ggthemes: Extra Themes, Scales and Geoms for ‘ggplot2’. R package version 5.1.0, https://CRAN.R-project.org/package=ggthemes.
Bache S, Wickham H (2025). magrittr: A Forward-Pipe Operator for R. doi:10.32614/CRAN.package.magrittr https://doi.org/10.32614/CRAN.package.magrittr, R package version 2.0.4, https://CRAN.R-project.org/package=magrittr.
Hyndman R, Athanasopoulos G, Bergmeir C, Caceres G, Chhay L, O’Hara-Wild M, Petropoulos F, Razbash S, Wang E, Yasmeen F (2025). forecast: Forecasting functions for time series and linear models. R package version 8.24.0, https://pkg.robjhyndman.com/forecast/.
Hyndman RJ, Khandakar Y (2008). “Automatic time series forecasting: the forecast package for R.” Journal of Statistical Software, 27(3), 1-22. doi:10.18637/jss.v027.i03 https://doi.org/10.18637/jss.v027.i03.
Neuwirth E (2022). RColorBrewer: ColorBrewer Palettes. R package version 1.1-3, https://CRAN.R-project.org/package=RColorBrewer.
Posit team (2026). RStudio: Integrated Development Environment for R. Posit Software, PBC, Boston, MA. URL http://www.posit.co/.
Quarto Development Team. Quarto. Version 1.9.36. 2026. https://quarto.org/.
R Core Team (2026). R: A Language and Environment for Statistical Computing. R Foundation for Statistical Computing, Vienna, Austria. https://www.R-project.org/.
Rinker, T. W. & Kurkiewicz, D. (2017). pacman: Package Management for R. version 0.5.0. Buffalo, New York. http://github.com/trinker/pacman
Vanderkam D, Allaire J, Owen J, Gromer D, Thieurmel B (2018). dygraphs: Interface to ‘Dygraphs’ Interactive Time Series Charting Library. R package version 1.1.1.6, https://CRAN.R-project.org/package=dygraphs.
Wickham H, Averick M, Bryan J, Chang W, McGowan LD, François R, Grolemund G, Hayes A, Henry L, Hester J, Kuhn M, Pedersen TL, Miller E, Bache SM, Müller K, Ooms J, Robinson D, Seidel DP, Spinu V, Takahashi K, Vaughan D, Wilke C, Woo K, Yutani H (2019). “Welcome to the tidyverse.” Journal of Open Source Software, 4(43), 1686. doi:10.21105/joss.01686 https://doi.org/10.21105/joss.01686.
Xie Y (2025). knitr: A General-Purpose Package for Dynamic Report Generation in R. R package version 1.50, https://yihui.org/knitr/.
Yihui Xie (2015) Dynamic Documents with R and knitr. 2nd edition. Chapman and Hall/CRC. ISBN 978-1498716963
Yihui Xie (2014) knitr: A Comprehensive Tool for Reproducible Research in R. In Victoria Stodden, Friedrich Leisch and Roger D. Peng, editors, Implementing Reproducible Computational Research. Chapman and Hall/CRC. ISBN 978-1466561595
Zhu H (2024). kableExtra: Construct Complex Table with ‘kable’ and Pipe Syntax. R package version 1.4.0, https://github.com/haozhu233/kableExtra, http://haozhu233.github.io/kableExtra/.