SE Asia Stocks-Most down; Thai index near 2-yr low on telecoms shares

BANGKOK, Dec 21 (Reuters) - Most Southeast Asian stock markets fell on Monday in thin trading volume amid foreign investors-led selling, with the Thai benchmark extending losses to a near two-year low due to selloffs in telecoms shares. Thai SET index ended down 1.6 percent at 1,264.44, the lowest close since Jan 30, 2014. Shares of telecoms firms dived after the auction of two 4G spectrum licences ended at the weekend at high prices, spurring concerns over future costs and competition.