Forecasting the Taiwan Stock Market with a Novel Momentum-based Fuzzy Time-series
Bibliographic record
Abstract
Fuzzy time-series models have been utilized in making reasonably accurate predictions in many areas, such as academic enrollments, weather forecasting and stock markets. To refine past fuzzy time-series models, this paper proposes a new model, which employs the concepts of ¡°momentum¡± along with Chebyshev¡¯s theorem in the forecasting process. The proposed model applies a ¡°momentum¡± index to generate forecasting rules (fuzzy logical relationships) to reduce the probability of rules not being found in cases where no rules are available to forecast a testing dataset. Chebyshev¡¯s theorem is adopted to define a ¡°reasonable¡± universe of discourse for the observations in a training dataset. From the refined process, two types of universe, symmetrical and asymmetrical, are given. To verify the proposed model, this paper employs experimental datasets, derived from a seven-year period of the Taiwan Stock Exchange Capitalization Weighted Stock Index (TAIEX). Model comparison results show that the proposed model surpasses in accuracy one traditional fuzzy time-series model and two advanced models, based on neural networks and rough set algorithms.
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How this classification was reachedexpand
Full frame machine prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. The Gemma side is a direct model label for every work in the frame, read from the title-only record. The Codex side is a classifier learned from the 10,348 direct Codex labels and calibrated to design-weighted sample rates; fields without enough sample support carry no Codex call. Candidate is the union of the two sides; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels.
Distilled classifier scores by category (both heads)
| Category | Codex | Gemma |
|---|---|---|
| Metaresearch | 0.001 | 0.001 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.001 | 0.001 |
| Bibliometrics | 0.001 | 0.001 |
| Science and technology studies | 0.000 | 0.000 |
| Scholarly communication | 0.001 | 0.001 |
| Open science | 0.001 | 0.000 |
| Research integrity | 0.000 | 0.000 |
| Insufficient payload (model declined to judge) | 0.000 | 0.000 |
Machine scores (provisional)
The two teacher heads of the student model, read on this work. A score orders the frame for review; it never asserts a category, and the validation status ships verbatim with every row.
Baseline scores from an immature model (maturity gate not passed, 7 training rounds). Scores rank; they never assert a category.
score_only:v0-immature-baseline · verbatim from the scoring run: score_only means the number may rank works, and no category label ships from itClassification
machine, unvalidatedMachine predicted; a candidate call from one source (direct Gemma or distilled Codex), not a consensus.
How this classification was reached, model by model and score by score, is at the end of the page under "How this classification was reached".