STOCKS NEWS MIDEAST-Saudi stocks plunge 4.6 pct on regional tensions

RIYADH, June 15 (Reuters) - Saudi Arabia's stock market plunged 4.57 percent to a 13-month low on Saturday, with its biggest listed companies losing value, after King Abdullah cut short a holiday abroad because of regional tensions.

Only one of the 156 companies listed on the all-share index gained value. All 155 others fell.

Heavyweight Saudi Basic Industries Corp (SABIC), the world's biggest petrochemical company, fell 2.13 percent, while Al Rajhi Bank, the kingdom's largest listed lender, lost 4.5 percent. (Reporting By Angus McDowall; Editing by Susan Fenton)