Taiwan Emerging Stock Board (興櫃) Quotes & Pre-IPO Company API

Get structured JSON access to every stock on Taiwan's Emerging Stock Board — the pre-IPO tier that a company must trade on for at least six months before it can list on TWSE or TPEx. Daily quotes, bid/ask and turnover for all 359 registered stocks, per-stock price history back to 2003-09-29, the full MOPS company register, EPS and paid-in-capital rankings, the recommending dealers that make the market, and where each company stands in its listing application.

This is where TSMC's suppliers, Taiwan's biotech pipeline and the next round of AI hardware names trade before anyone outside Taiwan can see them. The exchange's own feed carries only the latest session, and its public history form will not let you pick a month before 2007. This Actor serves the whole board in one request, reaches back to the first month the archive holds, and reconciles every number against the exchange's own daily market summary before emitting it.

Why this data matters

• It is a pre-IPO watchlist that already has prices. Every TWSE and TPEx listing spends at least six months here first. ipo_application_status_code and the applicant-register dates show you the ~33 companies queueing to move up right now, ipo_target_board_inferred tells you which exchange they are heading for, and ipo_lead_underwriter names the bank running the deal.
• No price limit, so the moves are real. Unlike the main boards, the emerging board has no daily up/down cap. A stock can move 30% in a session, and high_price / low_price show it.
• Twenty-three years of history, not an accumulating snapshot. The exchange's own form starts at 2007-01, but the report behind it answers back to 2003-09-29 — the first session any stock still on the board has on file. You can reconstruct a company's entire pre-IPO price record and line it up against its eventual listing.
• The company register comes with it. Tax ID, English symbol, chairman, spokesman, incorporation date, board registration date, par value, issued shares and paid-in capital, joined onto every quote. The tax ID is the join key to Taiwan's company registry.
• Recommending dealers are the board's market makers. Every emerging stock must keep dealers on file to quote it — 1,120 dealer-stock pairs across 24 securities firms. Which dealers a company uses, and when they were added, is public and rarely looked at.
• Nobody serves this in English. Search for a Taiwan emerging-board API and there is nothing. The register even keeps company addresses in English, which no other Taiwanese market publication does.

Output

Three record types, selected with recordTypes.

QUOTE — one record per stock, latest session:

{
  "record_type": "QUOTE",
  "market": "TPEX_EMERGING",
  "date": "2026-08-14",
  "published_time": "163005",
  "stock_code": "6826",
  "stock_name": "和淞",
  "previous_average_price": 481.33,
  "average_price": 475.75,
  "latest_price": 474.5,
  "high_price": 482.0,
  "low_price": 468.5,
  "price_change": -5.58,
  "price_change_pct": -1.1593,
  "price_direction": "DOWN",
  "bid_price": 468.5,
  "bid_quantity": 4000,
  "ask_price": 474.5,
  "ask_quantity": 1977,
  "traded_shares": 95865,
  "traded_value_ntd": 45607773.75,
  "last_trade_investor_side": "BUY",
  "trading_suspended_from": null,
  "has_traded_today": true,
  "ipo_application_status_code": null,
  "ipo_target_board_inferred": null,
  "eps": 27.33,
  "eps_rank": 1,
  "paid_in_capital_ntd": 855400000,
  "paid_in_capital_rank": 47,
  "paid_in_capital_rank_matches_register": true,
  "company_full_name": "和淞科技股份有限公司",
  "english_symbol": "TPC",
  "industry_code": "31",
  "unified_business_no": "97097825",
  "chairman": "應柔爾",
  "general_manager": "周志賢",
  "incorporated_on": "1996-07-09",
  "emerging_board_registered_on": "2021-06-17",
  "par_value_ntd": 10.0,
  "issued_common_shares": 85540000,
  "recommending_dealer_count": 7
}

HISTORY — one record per stock per past session, split by negotiation channel:

{
  "record_type": "HISTORY",
  "market": "TPEX_EMERGING",
  "date": "2018-05-02",
  "stock_code": "1260",
  "stock_name": "富味鄉",
  "matched_shares": 24726,
  "matched_value_ntd": 524092.0,
  "matched_high_price": 22.1,
  "matched_low_price": 21.02,
  "matched_average_price": 21.2,
  "matched_trade_count": 16,
  "off_system_shares": 1000000,
  "off_system_value_ntd": 21250000.0,
  "off_system_high_price": 21.3,
  "off_system_low_price": 21.2,
  "off_system_average_price": 21.25,
  "off_system_trade_count": 2,
  "total_shares": 1024726,
  "total_value_ntd": 21774092.0,
  "total_trade_count": 18,
  "has_traded": true,
  "vwap_identity_ok": true
}

MARKET_SUMMARY — the whole board in one record: registered stocks, combined paid-in capital and market value, turnover, trade count, dealer counts, and the advance/decline/unchanged/untraded spread.

Field	Meaning
date	Trading session, ISO 8601. The exchange publishes ROC years; they are converted here
previous_average_price / average_price	前日均價 / 日均價 (NT$). The average, not last price, is this board's reference price
latest_price / high_price / low_price	成交 / 日最高 / 日最低. No daily price limit applies
price_change / price_change_pct / price_direction	Day average against previous day average — the exchange's own basis
bid_price / bid_quantity / ask_price / ask_quantity	報買價/量, 報賣價/量 at the snapshot
traded_shares / traded_value_ntd	成交量 in shares, not lots, and average × shares
last_trade_investor_side	投資人成交買賣別 — BUY or SELL, whether the investor hit the ask or the bid
ipo_application_status_code / ipo_application_status_date	上市櫃進度 and 進度日期 — the listing application, published raw
ipo_target_board_inferred	TPEX or TWSE. Inferred, see below
ipo_review_committee_date … ipo_listing_date	The applicant register's milestone dates, joined by security code
ipo_status_date_matches	Which of those milestones the status date is exactly equal to
ipo_lead_underwriter / ipo_offering_price_ntd	主辦承銷商, 承銷價
eps / eps_rank	每股盈餘 and rank. Domestic issuers only — KY companies are null
paid_in_capital_ntd	實收資本額 from the MOPS register — the value treated as current
paid_in_capital_rank / paid_in_capital_rank_ntd / ..._matches_register	The ranking's position and its own capital figure, plus whether the two agree
company_full_name … accounting_firm	The MOPS company register, joined onto every quote
recommending_dealers / recommending_dealer_count	推薦證券商 — the dealers required to quote the stock
matched_* / off_system_* / total_*	HISTORY only — the two negotiation channels and their sum
vwap_identity_ok	HISTORY only — the published average reproduces from value ÷ shares

Five things about this board that will bite you

1. The history feed's JSON silently merges two different markets into one row. The report has a two-level header — 電腦議價點選成交 over the first six columns, 系統外議價成交 over the next six — but the JSON API flattens it and hands back the same six column names twice, with nothing to say which half is which. Read it naively and you either overwrite the first channel with the second or drop the second entirely. It matters: on 2018-05-02, 富味鄉 (1260) traded 24,726 shares on the click-to-deal system and 1,000,000 shares off it — 97.6% of the day's volume was in the columns most parsers throw away. This Actor holds the split by position and emits both channels plus their sum, and verifies the flattened header against the exact 13-name signature so a layout change fails the run rather than silently mis-assigning a column.

2. Off-system trades are rare enough to look like a dead column, and are not. Across 1,816 traded sessions sampled from 2004 to 2026, exactly three carried off-system volume — the 富味鄉 block above, and 燁聯 (9957) on two consecutive days in May 2011. If you sample a week and conclude the field is always zero, you will be wrong on the days that matter most: an off-system print is a negotiated block, which on this board usually means a pre-IPO placement.

3. "Up" and "down" are measured on the day's average, not the last price. The exchange's own daily summary counted 138 advancing, 200 declining, 9 unchanged and 12 untraded on 2026-08-14. Those four numbers reproduce exactly — and only — when you compare average_price against previous_average_price. Comparing last prices gives different answers. This is checked on every run.

4. The listing-application status code has no published legend, so this Actor does not invent one. ipo_application_status_code is emitted raw. What it does do is join TPEx's own main-board applicant register and report, in ipo_status_date_matches, which milestone the status date is exactly equal to — on 2026-08-14 every B matched 上櫃審議委員會日期 (6 of 6) and every E matched 同意上櫃買賣日期 (8 of 8). ipo_target_board_inferred is an inference and is named as one: all 20 upper-case codes also carried a filing in TPEx's applicant register and none of the 13 lower-case ones did, which reads as TPEx applications in upper case and TWSE applications in lower case. The raw code is always there if you disagree.

5. The capital ranking and the company register disagree, and both carry the same file date. On 2026-08-14 only 255 of 348 ranked companies matched the MOPS register's paid-in capital, and the differences ran in both directions — 穎台科技 (6775) is NT$120m higher in the register, 仲恩生醫 (7729) is NT$42m lower. The ranking is simply cut at a different moment. paid_in_capital_ntd comes from the register and is the one to use; the ranking's own figure is kept as paid_in_capital_rank_ntd with paid_in_capital_rank_matches_register flagging every disagreement. Neither is silently preferred.

Data integrity

Five independent publications describe this board, and this Actor reconciles itself against all of them before writing a row.

Every run is checked against the exchange's own daily market summary, and fails if it does not reconcile. 興櫃股票市場現況 is compiled separately from the quote feed, so seven identities have to hold — and each one pins down a definition the publications themselves never state:

Check	2026-08-14
Quoted stocks == 興櫃家數	359 == 359
Advancing, on day average vs previous day average	138 == 138
Declining	200 == 200
Unchanged	9 == 9
Untraded or suspended	12 == 12
Σ traded shares == 成交股數 (thousands)	50,498,659 == 50,499 × 1,000
Σ average × shares == 成交金額 (NT$m)	7,415,235,049 == 7,415 × 10⁶

The last two are what establish that the summary prints shares in thousands and money in NT$ millions, and that turnover is average price times shares — none of which is documented. A failure raises rather than publishing numbers the Actor cannot reconcile.

The history report is cross-checked against the snapshot feed. They are separate publications reached by completely different paths. Where a fetched month overlaps the current session, shares, average, high and low are compared value for value — all matched exactly in testing, and the check runs on every execution (crossCheck, on by default).

Every historical session must reproduce its own average. value ÷ shares has to come back as the published 成交均價, and the average has to sit inside the high–low range, for each channel separately. Across 1,816 traded sessions sampled over eleven years spread from 2004 to 2026, plus every session 燁聯 (9957) has on file for 2003-09 and 2003-10, there were zero violations. The tolerance allows for the published value being rounded to the dollar, which on a one-share trade moves the quotient by a full NT$1.

The register and the dealer file are checked for coverage. The MOPS company register covered all 359 quoted stocks exactly, and the recommending-dealer file reproduced both counts the market summary publishes — 1,120 dealer-stock pairs across 24 distinct firms.

Beyond that, the parser refuses to guess. The quote feed's 18 columns and the history report's 13 are verified against an exact signature, and an unrecognised layout fails the run rather than being read into the wrong field. An unknown security code, a main-board code that was never on this board, a month before the stock registered and a month that has not happened yet all return no rows and no error, because the exchange answers all four with the same 查無…歷史資料 message.

Input

Field	Type	Description
recordTypes	array	Any of QUOTE, HISTORY, MARKET_SUMMARY. Default ["QUOTE", "MARKET_SUMMARY"]
stockCodes	array	e.g. ["6826", "1260"]. Empty = every registered stock
startMonth	string	YYYY-MM for HISTORY. Empty = the current month. Floor is 2003-09
endMonth	string	YYYY-MM inclusive; empty = just the start month
ipoApplicantsOnly	boolean	Keep only companies with a listing application in progress
tradedOnly	boolean	Drop the stocks that did not trade in the session
includeCompanyProfile	boolean	Merge in the MOPS company register. Default true
includeRecommendingDealers	boolean	Add the recommending dealers as a nested list. Default false
crossCheck	boolean	Compare history against the snapshot feed and log the result. Default true

Example — today's whole board, plus the market summary:

{}

Example — every company queueing to list, with its underwriter and milestone dates:

{
  "recordTypes": ["QUOTE"],
  "ipoApplicantsOnly": true,
  "includeRecommendingDealers": true
}

Example — one company's full price history since it registered:

{
  "recordTypes": ["HISTORY"],
  "stockCodes": ["1260"],
  "startMonth": "2012-11",
  "endMonth": "2026-08"
}

Example — the whole board's last quarter of daily history:

{
  "recordTypes": ["HISTORY"],
  "startMonth": "2026-06",
  "endMonth": "2026-08"
}

Pricing & cost control

Pay per result: $0.50 / 1,000 records.

• Whole board today plus the market summary: 360 records ≈ $0.18
• Companies with a listing application in progress: 33 records ≈ $0.02
• One ticker's full history since registering (1260, 2012-11 to 2026-08): ~3,300 records ≈ $1.65
• Whole board, one month of daily history: ~7,200 records ≈ $3.60

QUOTE and MARKET_SUMMARY arrive as whole-board requests, so stockCodes, ipoApplicantsOnly and tradedOnly cut the bill without costing anything. HISTORY is one request per stock per month, so narrowing stockCodes there saves time as well as money — the whole board for a year is roughly 4,300 requests.

Data source & reliability

• Direct from TPEx: the emerging-board snapshot (tpex_esb_latest_statistics), the market summary (tpex_esb_highlight), the MOPS company register (mopsfin_t187ap03_R), the EPS and paid-in-capital rankings, the recommending-dealer file, the main-board applicant register, and the exchange's own 興櫃個股歷史行情 report — no third-party intermediaries
• The snapshot updates through the session and settles after the close; published_time carries the compilation time
• History coverage starts at 2003-09-29, and each stock's own record starts when it registered on the board — an earlier month returns no rows and no error rather than an empty run
• The history report serves stocks currently registered on the board. A company that has already moved up to TWSE or TPEx is no longer queryable here; its post-listing prices are on the main-board feeds
• The EPS ranking covers domestic issuers only, so foreign-incorporated (KY) companies come back with eps: null — that is the publication's scope, not a gap
• The board's total market value published in MARKET_SUMMARY is passed through as the exchange states it and is not recomputed, because it does not reproduce from issued shares × price and the exchange does not document its basis

Use cases

• Pre-IPO screening — track the companies queueing for a TWSE or TPEx listing, with the underwriter, the committee and approval dates, and the price the market is already paying
• IPO pricing research — line the emerging-board average price in the months before a listing up against the eventual offering price
• Supply-chain mapping — the register's tax ID joins these companies to Taiwan's company registry and to their customers' filings
• Biotech and hardware pipeline monitoring — Taiwan's drug-development and AI-hardware names trade here for years before listing
• Liquidity and market-structure research — 23 years of two-channel turnover on a quote-driven, no-price-limit, dealer-recommended market
• Event studies — no daily price limit means the price reaction to news is not truncated, which the main boards cannot give you

Taiwan Market Data Suite

This Actor is part of a suite of 19 Taiwan market data APIs by chamarix — official sources only, cross-validated against independent official endpoints, clean JSON out. Code samples for the whole suite: GitHub.

Market data:

• twse-institutional-trades — Daily institutional buy/sell (foreign, investment trust, dealer) per stock — TWSE listed
• tpex-institutional-trades — Daily institutional buy/sell per stock — TPEx OTC market
• taiwan-monthly-revenue — Monthly revenue of 1,900+ listed & OTC companies, MoM/YoY
• taiwan-financial-statements — Quarterly income statement, balance sheet & cash flow back to 2013
• taiwan-dividend-calendar — Ex-dividend / ex-rights dates, reference prices & payouts back to 2003
• taiwan-margin-trading — Daily margin trading & short sale balances per stock
• taiwan-sbl-short-sale-balance — Securities-lending short sale balances per stock
• taiwan-day-trading-stats — Day-trading volume, value & ratio per stock since 2014
• tdcc-shareholding-dispersion — Weekly TDCC shareholding dispersion (retail vs whale structure)
• taiwan-foreign-shareholding — Foreign ownership percentage & remaining quota per stock
• taifex-institutional-derivatives — Institutional futures & options positions (TAIFEX), incl. put/call ratio
• taiwan-stock-alerts — Watch-list, disposition & short-sale suspension alerts
• taiwan-insider-share-transfers — Insider share-transfer filings (directors, officers, 10% holders) since 2002
• taiwan-director-shareholdings — Monthly director/officer shareholdings & share-pledge ratio since 1999
• taiwan-block-trades — Every block trade (鉅額交易) with price, size & basket constituents since 2005
• taiwan-shareholder-meetings — Shareholder meeting dates, book closure periods & e-voting since 2005

Government & civic data:

• taiwan-legislator-monitor — Legislative Yuan bills, legislators & meetings
• taiwan-tender-monitor — Government e-procurement tenders (open calls, awards, failures)