Article 1
    These Directions are adopted pursuant to Articles 4 and 5 of the Taiwan Stock Exchange Corporation ("TWSE") Rules Governing Implementation of the Stock Market Surveillance System.

Article 2
    When the TWSE discovers any of the following circumstances during daily trading hours ("the intraday session") through analyzing transactions of exchange-listed securities (excluding foreign bonds, government bonds, and straight corporate bonds), it will take measures pursuant to the provisions of Article 3 herein:

1. Where, on trading volume of 3,000 trading units or more, the amplitude of change in the intraday transaction price exceeds 9 percent, while also exceeding the amplitude of change in the TWSE Capitalization-Weighted Stock Index by 5 percent or more.


2. Where, on trading volume of 3,000 trading units or more, the percentage of increase or decrease in the intraday transaction price exceeds 6 percent, while also exceeding the percentage of increase or decrease in the TWSE Capitalization Weighted Stock Index by 4 percent or more.


3. Where, on trading volume of 3,000 trading units or more, intraday turnover exceeds 10 percent, provided that this shall not apply to convertible bonds, bonds with non-detachable share options, preference shares with non-detachable share options, certificates of entitlement to new shares from convertible bond, call (put) warrants, share options, exchange-traded fund beneficial certificates and exchange-traded notes.


4. Where trading information is announced or disposition measures adopted pursuant to these Directions.


5. Where market rumors, media reporting, or TWSE computer analysis finds an irregularity, and signed approval is granted pursuant to a report of the incident.


6. Other circumstances designated by the competent authority.

    When calculating the price fluctuation limit of a security, if the formula includes factors such as the given underlying security or underlying index, the calculation is based on the intraday amplitude of price change, the difference between the percentage of increase or decrease in the price and the amplitude of the given underlying security or underlying index, and the percentage of increase or decrease in the price (for a basket of securities, the averages are calculated of the amplitudes of the underlying securities or underlying indexes of the basket of securities and of the percentages of increase or decrease in the price).
    The provisions of subparagraphs 1, 2, and 3 of paragraph 1 concerning "on trading volume of 3,000 trading units or more" do not apply during a period of trading without price limits of an initial listing of ordinary shares.
    When the trading volume of a security is below 1,000 units ("units" hereinafter collectively referring to shares, beneficial units, depositary receipt units, or other types of units), the numerical standards for the unit of the trading (or order) volume shall be adjusted according to the following formula:the adjusted numerical standards for the unit of trading (or order) volume = the pre-adjustment numerical standards for the unit of trading (or order) volume × (1000 ÷ the trading units of the given security).

Article 3
    To ensure security of settlement for securities trades, when TWSE analysis discovers any of the following circumstances in day trading at a securities firm involving the securities listed in the preceding article, it will, promptly after market closing, issue written notice to the internal auditing or operations department of the aforesaid securities firm, with a copy to the general manager of its head office; in the case of the Taiwan branch office of a foreign securities firm, it will bring the matter to the attention of the branch office manager:

1. Where the difference between an investors' purchase/sale orders for the given security at the given securities firm exceeds NT$300 million and also exceeds one time the net worth of the given securities firm, and where the volume it purchased (or sold) on consignment accounts for 20 percent or more of the total monetary volume of consigned purchases (or sales) of the given security.
2. Where the difference between orders accepted by a securities firm for purchase/sale of the given security exceeds NT$500 million and also exceeds 1.5 times the net worth of the given securities firm, and where the volume it accepted in consignments for purchases (or sales) accounts for 40 percent or more of the total monetary volume of all consignments for purchases (or sales) of the given security.
3. Where the difference between an investor's confirmed purchases/sales of the given security through the given securities firm exceeds NT$100 million and also exceeds 0.3 times the net worth of the given securities firm, and where the volume of its confirmed purchases (or sales) accounts for 10 percent or more of the total monetary volume of all confirmed trades in the given security.
4. Where the difference between confirmed purchases/sales of the given security by a securities firm exceeds NT$200 million and also exceeds one time the net worth of the given securities firm, and where the volume of the confirmed purchases (or sales) thereby accounts for 20 percent or more of the total monetary volume of confirmed trades in the given security.

    When the circumstances under subparagraphs 1 or 2 of the preceding paragraph apply to a securities firm, the TWSE may inform the persons referred to in paragraph 1 by telephone within the period when the trading order is consigned or the trade is made.
    During a period of trading without price limits of an initial listing of ordinary shares, the provisions of paragraphs 1 and 2 regarding notice to the securities firm shall apply mutatis mutandis under any of the circumstances listed below:

1. 1Where any of the following circumstances applies to the price of an investor's purchase/sale orders for the given security with the given securities firm, and the cumulative volume of those orders reaches 1,000 trading units (or the cumulative value of the orders reaches NT$50 million) or more:
1. Before market opening, a buy order is placed at a price higher than that day's opening reference price by 25 percent or more, or a sell order is placed at a price lower than that day's opening reference price by 25 percent or more.
2. After market opening, a buy order is placed at a price higher than the posted price for orders currently being transacted by 25 percent or more, or a sell order is placed at a price lower than the posted price for orders currently being transacted by 25 percent or more.
2. Where any of the following circumstances applies to the prices of orders accepted by a securities firm for purchase/sale of the given security, and the cumulative volume of those orders reaches 5,000 trading units or more or the cumulative value of those orders reaches either NT$200 million or 0.5 times or more of the given securities firm's net worth:
1. Prior to market opening, a buy order is placed at a price higher than that day's opening reference price by 25 percent or more, or a sell order is placed at a price lower than that day's opening reference price by 25 percent or more.
2. After market opening, a buy order is placed at a price higher than the posted price for orders currently being transacted by 25 percent or more, or a sell order is placed at a price lower than the posted price for orders currently being transacted by 25 percent or more.

    If trading of any securities listed in the preceding article under an omnibus trading account of a securities firm reaches a level referred to in paragraph 1 or paragraph 3, the TWSE may bring the matter to the attention of the management of the securities firm, to ensure the security of settlement for securities trades.
    When the trading volume of a security is below 1,000 units, the provisions of Article 2, paragraph 4 shall apply mutatis mutandis to the numerical standards for the unit of the trading (or order) volume.

Article 4
    At the close of trading each day, the TWSE will analyze the trading of exchange-listed securities (excluding foreign bonds, government bonds, and straight corporate bonds). Upon discovery of any of the following circumstances, the TWSE will announce related trading information (such as the degree of upward or downward movement in prices, trading volume, turnover rate, degree of concentration, price-to-earnings ratio, price to book ratio, long/short ratio, premium/discount percentage, sales quantity of borrowed securities, and day trading percentage):

1. An irregularity in the cumulative percentage of increase or decrease in the closing price during the most recent period.
2. An irregularity in the percentage of increase or decrease in the closing price between the initial and final business days of the most recent period.
3. An irregularity in the cumulative percentage of increase or decrease in the closing price during the most recent period, combined with an unusually large increase in the intraday volume of trade relative to the daily average in the most recent period.
4. An irregularity in the cumulative percentage of increase or decrease in the closing price during the most recent period, combined with an unusually high intraday turnover rate.
5. An irregularity in the cumulative percentage of increase or decrease in the closing price during the most recent period, combined with intraday consigned trading of the given security at a securities firm in which confirmed purchases or sales account for an unusually high percentage of the intraday volume of trade in the given security.
6. An irregular price-to-earnings rate or price-to-book ratio, or an usually high intraday turnover, combined with any of the following three circumstances: a relatively high price-to-book ratio for stocks of the given industry; an intraday value for confirmed purchases or sales of the given security at any single securities firm that accounts for an unusually high proportion of the total intraday value of confirmed trades in the given security; or an intraday value for confirmed purchases or sales of the given security by any single investor that accounts for an unusually high proportion of the total intraday value of confirmed trades in the given security.
7. An irregularity in the cumulative percentage of increase or decrease in the closing price and a significant increase in the long/short ratio during the most recent period.
8. An irregularity in the percentage of premium or discount calculated from the closing price of Taiwan Depository Receipts and the closing price, on the exchange market of their home country, of the shares they represent.
9. A significant increase in the daily volume of trading for a given day or several recent days relative to the daily average volume of trade for the most recent period.
10. A significantly high cumulative turnover rate for the most recent period.
11. An irregularity in the difference between the closing prices on the initial and final business days of the most recent period.
12. The trading volume of the sales of borrowed securities accounting for a significantly high percentage of the total volume of trade of the most recent period.
13. The day trading volume accounting for a significantly high percentage of the total volume of trade of the most recent period.
14. Other trading irregularities as determined by resolution of the Surveillance Operations Oversight Committee.

    If there is no closing price for a security on a given day to serve as the basis for calculation of any irregularity listed under the preceding paragraph, the price determined pursuant to Article 58-3 of the TWSE Operating Rules shall be used instead.
    When calculating the price fluctuation limit of a security, if the formula includes factors such as the given underlying security or underlying index, the provisions of Article 2, paragraph 2 shall apply mutatis mutandis to the calculation of the cumulative percentage of increase or decrease in the price within a certain period.
    When the trading volume of a security is below 1,000 units, the provisions of Article 2, paragraph 4 shall apply mutatis mutandis to the numerical standards for the unit of the trading (or order) volume.
    Numerical standards for the irregularities listed under each of the subparagraphs of paragraph 1, and any exceptions to those conditions, shall be separately adopted by the TWSE.

Article 5

    Given the occurrence of any of the circumstances of the preceding article in securities trading, the TWSE will announce the name of the security and related trading information through the following channels:

1. The information will be announced on the TWSE Market Information System (MIS), with the wording "attention negotiable security" preceding the name of the security.


2. The information will be provided for investor inquiry through the Internet and the Investor Service Number.


3. Securities firms will be requested to post the information at their places of business.


4. The information will be provided to the media for dissemination by broadcast and publication.

Article 6

    When any of the following circumstances applies to the trading of securities, the TWSE will immediately announce that the security will be subject to disposition measures:

1. The TWSE has announced trading information for a particular security pursuant to Article 4, paragraph 1, subparagraph 1 for a period of 3 consecutive business days
2. The TWSE has announced trading information for a particular security pursuant to Article 4, paragraph 1, subparagraphs 1 to 8 for a period of 5 consecutive business days, or for any 6 business days with the most recent 10-day period, or for any 12 business days within the most recent 30-day period.

    Where measures under paragraph 1 have been announced for a particular security for the first time within the most recent 30 business days, the TWSE will simultaneously adopt the following measures within 10 business days of the next business day after the condition occurs:

1. Conducting trade matching for the securities with manually controlled trade matching terminals (matching approximately every 5 minutes, or for securities placed under altered trading methods, every 10 minutes; for securities under altered trading methods for which periodic call auction is also used, approximately every 45 minutes).


2. Notifying securities brokers that when an investor's daily volume of trading orders for the security during the given period consists of a single trade of 10 trading units or multiple trades with an aggregate total of 30 trading units or more, they shall collect from the investor the full amount of the buy-side price or sell-side securities for trades already consigned that day; for margin trading, they shall collect in full the margin for the purchase or the short sale. For further trading orders in excess of the aforementioned amounts on the same day, the buy-side price or sell-side securities shall also be collected in full, and for margin trading, the margins shall also be collected in full. This, however, shall not apply to liquidation of margin trades or orders to trade the security through a default account, a call (put) warrant liquidity provider account or a call (put) warrant hedging account.

    When the measures under paragraph 1 have been announced two or more times (inclusive) for a particular security within the most recent 30 business days, the TWSE will simultaneously adopt the following measures within 10 business days of the next business day after the occurrence:

1. Conducting trade matching for the securities with manually controlled trade matching terminals (matching approximately every 20 minutes; for securities under altered trading methods, approximately every 25 minutes; for securities under altered trading methods for which periodic call auction is also used, approximately every 60 minutes).


2. Notifying securities brokers that for an investor's daily volume of trading orders for the security during the given period, they shall collect from the investor in full the buy-side price or sell-side securities for trades already consigned that day; for margin trading, they shall collect in full the margin for the purchase or the short sale. This, however, shall not apply to liquidation of margin trades or orders to trade the security through a default account, a call (put) warrant liquidity provider account or a call (put) warrant hedging account.

Where trading information has been announced for a particular security by the TWSE for three consecutive business days pursuant to Article 4, paragraph 1, subparagraph 1, or for five consecutive business days pursuant to Article 4, paragraph 1, subparagraphs 1 to 8, and disposition is announced pursuant to paragraph 2 or 3 herein, and attention to trading information has been announced pursuant Article 4, paragraph 1, subparagraph 13 during the period when basis of disposition to be announced is being calculated, the effective period of the disposition measures for that security is changed to 12 business days from the next business day.

    When measures are announced for a particular security pursuant to paragraph 2 or 3 herein and reasons for announcement include circumstances under Article 4, paragraph 1, subparagraph 6, or during the period of disposition the TWSE further announces trading information pursuant to the aforementioned subparagraph 6 and analysis shows irregularities; or when the TWSE announces trading information pursuant to Article 4, paragraph 1, subparagraph 9, 10,11, 12or 13 and analysis shows irregularities; or when the TWSE deems that there is a securities trading irregularity with the likelihood of a significant impact on the security of settlements in the market, or under other circumstances when it is necessary to maintain order in the markets or the security of settlements, then after reporting to the Surveillance Operations Oversight Committee for a resolution, the TWSE may adopt the following disposition measures:

1. The measures under paragraphs 2 and 3, provided that these may be adjusted when necessary, as follows:


1. The time at which trade matching of the security is done using manually controlled trade matching terminals.


2. Whether, when the investor places the order for the security involved in the irregular trading, there is advance collection of all or a specific proportion of the buy-side price, sell-side securities, margin for margin purchase, or margin for short sale.


3. The effective period of the measures.


2. Amounts of reported daily sales or purchases of the given security may not exceed NT$60 million by the head office of any securities firm or NT$10 million by a branch office of any securities firm; when necessary, the amounts of reported daily sales or purchases of the given security at the head offices and branch offices of securities firms may be adjusted based on the current trading in that security, its market value, or the capitalization of the issuing company;provided, however, that this shall not apply to liquidation of margin trades or orders to trade the security through a default account, a call (put) warrant liquidity provider account or a call (put) warrant hedging account.


3. Notifying all securities firms to make an additional submission to the Clearing and Settlement Fund when trading the security involved in irregular trading.


4. Temporarily suspending margin purchases and short sales of the given security, provided that this shall not apply for already concluded trades.


5. Suspending trading of the given security for a specific period after reporting to and receiving approval from the competent authority.


6. Other measures.
   

    Measures for disposition under subparagraph 2 of the preceding paragraph may also be adopted pursuant to a resolution of the special management committee of the Joint Responsibility System Clearing and Settlement Fund, which may prescribe the amounts of reported daily purchases or sales of the given security by securities firms and the period of disposition.
    When disposition measures are adopted with respect to trading in a given security by resolution of the Surveillance Operations Oversight Committee or the special management committee of the Joint Responsibility System Clearing and Settlement Fund, the number of days on which trading information is announced prior to implementation of the measures or during the effective period of the disposition need not be included in the calculation under paragraph 1 for announcement of basis of disposition.
    Wherean issuing company submits specific financial and business information to request a responseafter disposition measures in respect of a security have been announced, it may terminate or adjust such measures subject to the discussion and resolution of the Surveillance Operations Oversight Committee.
    If during a period of any measure an order is placed for trading of the given securities under an omnibus trading account of a securities broker, the provisions for that measure shall apply, and the securities firm shall collect all or a specific proportion of the buy-side price or sell-side securities from any representative (mandatary) for any principal thereunder that reaches the threshold.
    When the trading volume of a security is below 1,000 units, the provisions of Article 2, paragraph 4 shall apply mutatis mutandis to the numerical standards for the unit of the trading (or order) volume.

Article 7

    When the TWSE adopts measures for disposition pursuant to the previous article, the content of the measures will be announced through the following channels:

1. The information will be announced on the TWSE Market Information System (MIS), with the wording "negotiable security under disposition measures" preceding the name of the security.


2. The information will be provided for investor inquiry through the Internet and the Investor Service Number.


3. Securities firms will be requested to post the information at their places of business.


4. The information will be provided to the media for dissemination by broadcast and publication.

Article 8
    The TWSE has installed surveillance cameras and telephone recording systems in the working areas where online real-time information is provided; personnel executing their duties pursuant to these Directions shall abide by the provisions of the Regulations for Management of Personnel Surveillance, with full video and telephone recordings of their activities. Video and telephone recordings shall be retained for a period of at least 3 months.

Article 9
    These Directions shall take effect and implemented on a prescribed date after having been submitted to and approved by the competent authority.