Aug 18 (Reuters) - Shares in Indonesian e-commerce firm Bukalapak (BUKA.JK) dropped by 6.74% on Wednesday to 830 rupiah, with the stock shedding 21% since its IPO earlier this month. Bukalapak, the country"s first listed tech unicorn, debuted on Aug. 6 after raising $1.5 billion in an initial public offering, the biggest IPO in Indonesia. read more Reporting by Fanny Potkin Editing by Ed Davies Our Standards: The Thomson Reuters Trust Principles.