Nation Broadcasting Public : List of securities which has triggered the Market Surveillance Measures

Headline:	List of securities which has triggered the Market Surveillance Measures
Security Symbol:	ARIN, BKD, FSMART, MAI, NBC, SET
Announcement Details
Level 1 : Excluded from Credit Limit and Cash Balance
Security		Symbol	Start date	End date
ARINSIRI LAND PUBLIC COMPANY LIMITED	ARIN	30-May-2022	17-Jun-2022
BANGKOK DEC-CON PUBLIC COMPANY LIMITED	BKD	30-May-2022	17-Jun-2022
Warrant of BANGKOK DEC-CON PUBLIC COMPANY LIMITED No.	BKD-W2	30-May-2022	17-Jun-2022
2
FORTH SMART SERVICE PUBLIC COMPANY LIMITED	FSMART	30-May-2022	17-Jun-2022
NATION BROADCASTING CORPORATION PUBLIC COMPANY	NBC	30-May-2022	17-Jun-2022
LIMITED
Extended Period
-		-	-	-
Level 2 : Prohibit Net Settlement, Excluded from Credit Limit and Cash Balance
Security		Symbol	Start date	End date
-		-	-	-
Extended Period
-		-	-	-

Level 3 : A One-day Suspension of Trading, followed by Prohibit Net Settlement, Excluded from Credit Limit and Cash Balance

Security	Symbol	Start date	End date
-	-	-	-
Extended Period
-	-	-	-
Remark

When a common stock has triggered the Market Surveillance Measures, securities of a listed company and securities with common stock as underlying assets (excluding DW) are also subject to the same measures which are as follows:

1. Cash Balance means each member must ensure that its customers pay the full amount in cash prior to trading.
2. Excluded from Credit Limit means the member must not use the security as collateral in the calculation of the customer's credit line in all types of account.
3. Prohibit Net Settlement means the member must not offset the trading value of buy amount and sell amount of a certain security on a given day. (The amount received from sale of the particular security will be credited back on the following day.)

Please note that the main factors used as criteria for the restricted securities above are the turnover ratio, the trading value and the price not corresponding with the fundamental factors such as P/E ratio, etc.