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Market & Prices

Market indices

Name: Market indices
Creator: TW Market Data
License: https://twmarketdata.com/en/legal/licensing

Daily levels for TWSE market indices — the TAIEX and its sector indices, open/high/low/close by trading day.

← Market indices overview

VerifiedSource: TWSE·Plan: free·Cost: 1 credits·GET /v2/datasets/market-index

Market indices is a Taiwan market dataset sourced from TWSE, served by TW Market Data as GET /v2/datasets/market-index.

Overview

market-index returns one row per index per trading day from the official TWSE index publication, covering the headline TAIEX and the sector indices. Each row carries its source role so an index level can be traced back to the exchange feed.

Field	Type	Description
`index_identity`	object
`market_identity`	object
`index_level`	object
`daily_change`	object
`turnover`	object
`safe_usage_notes`	array
`available_tools_or_endpoints`	object

Coverage

Rows	~4,174
Window	2009-01-05 – 2026-09-04
Grade	Verified
Measured	2026-09-04from the dataset registry

Example response

A real response from this endpoint. Rows are returned under "items", and provenance is carried in the shape shown below — it is not identical across datasets, so read this page's rather than assuming another's.

{
  "dataset_id": "market-index",
  "row_count": 50,
  "items": [
    {
      "index_identity": {
        "index_code": "TWSE_TAIEX",
        "index_name": "<Chinese value - see the zh page>",
        "index_version": "v1",
        "index_type": "price"
      },
      "market_identity": {
        "market": "TWSE",
        "as_of_date": "2026-08-05",
        "provider": "twse_official",
        "source_role": "official_twse_mi_index"
      },
      "index_level": {
        "value": 44611.6
      },
      "daily_change": {
        "points": 1250.94,
        "return_pct": 2.88
      },
      "turnover": {
        "turnover_value": null,
        "volume_shares": null
      },
      "source_lineage": {
        "scope": "<Chinese value - see the zh page>",
        "source": "TWSE_MI_INDEX",
        "match_rule": "exact string equality; total-return index explicitly excluded",
        "source_url": "https://www.twse.com.tw/exchangeReport/MI_INDEX?response=json&date=20260805&type=IND",
        "matched_index_name": "<Chinese value - see the zh page>",
        "index_return_pct_units": "percent (matches the stored convention)"
      },
      "data_gaps": [],
      "safe_usage_notes": [
        "breadth_overview_sector_rows_are_held",
        "not_investment_advice",
        "twse_taiex_index_only_scope"
      ],
      "available_tools_or_endpoints": {
        "dataset_endpoint": "/v2/datasets/market-index",
        "lookup_hint": "index_code=TWSE_TAIEX&market=TWSE",
        "scope_note": "taiex_index_only_read_model"
      }
    },
    {
      "index_identity": {
        "index_code": "TWSE_TAIEX",
        "index_name": "<Chinese value - see the zh page>",
        "index_version": "v1",
        "index_type": "price"
      },
      "market_identity": {
        "market": "TWSE",
        "as_of_date": "2026-08-04",
        "provider": "twse_official",
        "source_role": "official_twse_mi_index"
      },
      "index_level": {
        "value": 43360.66
      },
      "daily_change": {
        "points": -25.75,
        "return_pct": -0.06
      },
      "turnover": {
        "turnover_value": null,
        "volume_shares": null
      },
      "source_lineage": {
        "scope": "<Chinese value - see the zh page>",
        "source": "TWSE_MI_INDEX",
        "match_rule": "exact string equality; total-return index explicitly excluded",
        "source_url": "https://www.twse.com.tw/exchangeReport/MI_INDEX?response=json&date=20260804&type=IND",
        "matched_index_name": "<Chinese value - see the zh page>",
        "index_return_pct_units": "percent (matches the stored convention)"
      },
      "data_gaps": [],
      "safe_usage_notes": [
        "breadth_overview_sector_rows_are_held",
        "not_investment_advice",
        "twse_taiex_index_only_scope"
      ],
      "available_tools_or_endpoints": {
        "dataset_endpoint": "/v2/datasets/market-index",
        "lookup_hint": "index_code=TWSE_TAIEX&market=TWSE",
        "scope_note": "taiex_index_only_read_model"
      }
    }
  ],
  "held_policy": {
    "market_breadth_items": "held",
    "market_overview_snapshots": "held",
    "sector_or_unknown_index_rows": "held"
  }
}

Captured from the live API on 2026-07-20.

Chinese data values are shown as a marker here so this page stays in English; the /zh page shows them verbatim.

Provenance

These columns are returned alongside the data and record where the row came from. They are provenance, not the dataset's subject matter, so they are listed here rather than in the field table.

source_lineagedata_gaps

Licence and attribution

Part of the data in this service is obtained from the Government Open Data Platform (data.gov.tw) and used under the Open Government Data License, version 1.0. Providing agencies: Taiwan Stock Exchange, Taipei Exchange, Taiwan Futures Exchange, Taiwan Depository & Clearing Corporation, National Development Council, Central Bank of the Republic of China (Taiwan), Department of Statistics of the Ministry of Economic Affairs, and Customs Administration of the Ministry of Finance. The value-added processing, derived calculations and presentation in this service are the responsibility of TWMD and are not associated with the providing agencies.

Cite this dataset

TW Market Data. (n.d.). Market indices [Data set]. TW Market Data. Retrieved 2026-09-05, from https://twmarketdata.com/en/docs/api/market-prices/market-index

The version is the dataset's own as_of, not the date this page was built. Where we have no as_of the field is left out rather than filled in. Check a signature

Datasets that join with this one. The key each pair aligns on is shown, so you can plan a multi-table query without guessing.

Index classification
Same domain: market-prices
Index constituents
Same domain: market-prices
Industry index (daily)
Same domain: market-prices
Limit-Up/Down Events
Same domain: market-prices
Market breadth
Same domain: market-prices

Getting started

Put your key in the X-API-Key header.
Add query parameters (symbol, date range, limit).
Send the request and read the items array.

curl "https://api.twmarketdata.com/v2/datasets/market-index?index_code=TWSE_TAIEX&market=TWSE&start_date=2026-06-01&end_date=2026-07-15&limit=5" \
  -H "X-API-Key: sk_live_..."

Filtering

Parameter	Required	Type	Description
`index_code`	No	string	Index code, e.g. TWSE_TAIEX. Note IX0001 is not a valid code for this endpoint.
`market`	No	string	Market. TWSE returns rows; TPEX currently returns none.
`start_date`	No	string	Start of the query range (YYYY-MM-DD).
`end_date`	No	string	End of the query range (YYYY-MM-DD).
`limit`	No	integer	Maximum rows to return; the endpoint rejects anything above 500.

Python

import requests

resp = requests.get(
    "https://api.twmarketdata.com/v2/datasets/market-index",
    params={"index_code": "TWSE_TAIEX", "market": "TWSE", "limit": "5"},
    headers={"X-API-Key": "sk_live_..."},
)
resp.raise_for_status()
print(resp.json()["items"])

OpenAPI

This endpoint is GET /v2/datasets/market-index. The full machine-readable schema (parameters, security, response envelope) lives in the OpenAPI spec.

Notes & limitations

This endpoint filters by `index_code` (TWSE_TAIEX for the TAIEX) or `market` — not by a stock `symbol`, which is ignored. `IX0001` is not a valid code here and returns no rows.

Request & Response

Request

curl "https://api.twmarketdata.com/v2/datasets/market-index?start_date=2026-01-01&end_date=2026-06-30&limit=5" \
  -H "X-API-Key: $TWMD_API_KEY"

Response

{
  "dataset_id": "market-index",
  "row_count": 50,
  "items": [
    {
      "index_identity": {
        "index_code": "<string>",
        "index_name": "<string>",
        "index_version": "<string>",
        "index_type": "<string>"
      },
      "market_identity": {
        "market": "<string>",
        "as_of_date": "<string>",
        "provider": "<string>",
        "source_role": "<string>"
      },
      "index_level": {
        "value": "<number>"
      },
      "daily_change": {
        "points": "<number>",
        "return_pct": "<number>"
      },
      "turnover": {
        "turnover_value": "<null>",
        "volume_shares": "<null>"
      },
      "source_lineage": {
        "scope": "<string>",
        "source": "<string>",
        "match_rule": "<string>",
        "source_url": "<string>",
        "matched_index_name": "<string>",
        "index_return_pct_units": "<string>"
      },
      "data_gaps": "<array>",
      "safe_usage_notes": "<array>",
      "available_tools_or_endpoints": {
        "dataset_endpoint": "<string>",
        "lookup_hint": "<string>",
        "scope_note": "<string>"
      }
    }
  ]
}