Sehk (, also Romanized as Sahk; also known as Sek, Sekh, and Sik) is a village in Fakhrud Rural District, Qohestan District, Darmian County, South Khorasan Province, Iran. At the 2006 census, its population was 122, in 36 families.

The Stock Exchange of Hong Kong Limited (SEHK) is a stock exchange located in Hong Kong. It is Asia's third largest stock exchange in terms of market capitalization behind the Tokyo Stock Exchange and Shanghai Stock Exchange, and the sixth largest in the world behind Euronext. As of 30 November 2013, SEHK had 1,615 listed companies, 776 of which are from mainland China, 737 from Hong Kong and 102 from abroad (e.g. Cambodia, Italy, Kazakhstan, etc.)  Hong Kong Exchanges and Clearing owns SEHK and is itself listed on SEHK.