### Article NO. Content

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Amended Date： | 2018.02.14 |

Categories： |
Primary Market > Review Securities Exchange Market > Trading > Call (Put) Warrants |

Article 5 |
Issuers of call (put) warrants are rated as follows:- On the last business day of each quarter, the TWSE may, according to the following principle, calculate the issuers' scores in each indicator of the turnover rate and quality of market making of the specific quarter:
- Score of the turnover rate: calculate the daily turnover rate of the transaction amount of each issuer in the particular quarter by dividing the daily transaction amount of each TWSE/TPEx listed warrant by the turnover rate of the transaction amount of the calculation day of the market value of the particular warrant of the day. The percentage rate number (hereinafter referred to as "PR Value") of such indicator of the issuer is the score of the indicator.
- Score of each indicator of quality of market making: calculate first the Standard Deviation of TWBIV, 1 divided by the Daily Price Difference Ratio of Buy and Sell minus the PR Value, and the PR Value of the Daily Best Buy Amount, of the warrants of the same object each day; then calculate the quarterly average value of the above-mentioned three values of each type of issuer. The PR value of the quarterly average value of each indicator of the issuer is the score of each indicator, provided only TWSE/TPEx listings of each object that total 10 or more after deduction of those with no outstanding units on the preceding trading day are included in the calculation of the Daily Best Buy Amount.
- Issuers are classified into five classes, namely A, B, C, D and E based on their weighted score of each indicator of turnover rate and the quality of market making, as below:
┌───┬──────────────────────────┐ │Class │Classification Standard │ ├───┼──────────────────────────┤ │A │Weighted score of the indicator of turnover rate ≧ │ │ │0.28 point │ │ │Weighted score of the indicator of the quality of │ │ │market making ≧0.42 point │ ├───┼──────────────────────────┤ │B │Weighted score of the indicator of turnover rate ≧ │ │ │0.2 point │ │ │Weighted score of the indicator of the quality of │ │ │market making ≧0.3 point │ ├───┼──────────────────────────┤ │C │Not Class A, B, D or E │ ├───┼──────────────────────────┤ │D │Weighted score of the indicator of the quality of │ │ │market making < 0.12 point │ ├───┼──────────────────────────┤ │E │Weighted score of the indicator of the quality of │ │ │market making = 0 point │ └───┴──────────────────────────┘ |