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Article 2
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When the TWSE discovers any of the following circumstances during the daily trading hours ("the intraday session") through analyzing the transactions of exchange-listed securities (excluding exchange-traded fund beneficial certificates and securities of which they are underlyings, 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 corporate bonds, corporate bonds with non-detachable warrants, preferred shares with non-detachable warrants, bond conversion entitlement certificates, call (put) warrants, and stock warrants.
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 common stock.
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).
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Article 6
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Where the TWSE has announced trading information for a particular security pursuant to Article 4, paragraph 1, subparagraphs 1-10 for a period of five consecutive business days, or for any six business days with the most recent 10-day period, or for any 12 business days within the most recent 30-day period, the TWSE will announce that the security will be subject to disposition measures.
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 5 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 five minutes, or for securities placed under altered trading methods, every ten 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 50 trading units or multiple trades with an aggregate total of 150 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, provided that this shall not apply at the time of liquidation of margin trades.
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).
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 at least 10 trading units or multiple trades of 30 trading units or more, 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. For further trading orders in excess of the abovementioned amounts on the same day, 50 percent of the buy-side price or sell-side securities shall also be collected, and for margin trading, the margins shall also be collected in full, provided that this shall not apply at the time of liquidation of margin trades and the placement of orders to sell securities in the default accounts.
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 8, or during the period of disposition the TWSE further announces trading information pursuant to the aforementioned subparagraph 8 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, it 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, this shall not apply at the time of liquidation of margin trades and the placement of orders to sell securities in the default accounts.
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 basis of calculation under paragraph 1.
If during a period of any measure under paragraphs 2 to 4 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.
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