Why the Bangkok Stock Exchange had to close

Sixto K. (Ting) Roxas , CEO of BANCOM of the Philippines had a seat on the Bangkok Stock Exchange and transferred it to TISCO to use. BANCOM was one of the three original shareholders of TISCO with a 20% holding. At that time Bankers Trust Company of NY owned 80% of BANCOM which it had set up in 1964.
Pisanu Chongsathitwattana was the TISCO officer responsible for stock brokerage and dealership. He would go over to the Southeast Asia Insurance Building on Silom Road across from Patpong in the afternoon to do some talking and trading. It was like an afternoon tea gentlemen's club. Bids and offers were done on a chalkboard.
Some 20 stocks were listed such as SCC Siam Cement, CMMC Construction Materials Marketing Co., SISCO Siam Iron & Steel Co., SKP Siam Kraft Paper, BJC Berli Jucker, etc. and some Thai government bonds. Trading was slow and few.