Feb. 18 (Bloomberg) -- SCMP Group Ltd., the publisher of the South China Morning Post, halted its shares in Hong Kong trading after jumping the most in more than 15 years.

The company plans to make “an announcement in relation to unusual price and trading movements and inside information of the company,” it said in a filing today, without elaboration. Jennifer Shay, a spokeswoman for the company, didn’t respond to an e-mail and phone call for response.

SCMP surged as much as 31 percent to HK$2.29 before the trading halt. The South China Morning Post is Hong Kong’s only paid-for English-language daily newspaper.

--Editors: Neil Denslow, Michael Tighe