(LEAD) Hyundai Merchant, shipowners agree on 21 pct cut in charter rates

(ATTN: ADDS more info in para 5, 10, 16)

SEOUL, June 10 (Yonhap) -- Hyundai Merchant Marine Co., a financially troubled shipping giant, said Friday that it has reached an agreement with owners of its chartered ships to cut leasing rates by slightly ov