Bangkok--24 Oct--SET The Stock Exchange of Thailand (SET) has noted that there have been an unusual trading in terms of price and trading value of THAI NONDESTRUCTIVE TESTING PUBLIC COMPANY LIMITED "TNDT" ("Company") securities under high speculation during Oct 16 to 22, 2007 compare to previous period without any supportive material information. To prevent such negative repercussions, member firms of the SET are hereby prohibited from providing both net settlement trading and margin loans trading for the company's securities. This prohibition shall be effective during Oct 24 to Dec 4, 2007