Mizuho Sec may see 100 bln subprime loss -paper

TOKYO, Nov 9 (Reuters) - Japan's Mizuho Securities, the unlisted brokerage arm of Mizuho Financial Group (8411.T), may have suffered as much as 100 billion yen ($889 million) in subprime-related losses, causing a delay in its planned merger with Shinko Securities Co Ltd (8606.T), the Nikkei newspaper said on Friday.

Mizuho Financial, Japan's second-largest bank, said on Monday it may be forced to change the share swap ratio to be used in the merger after its brokerage arm posted a first-half loss on subprime investments.

Shares of Mizuho fell 5.3 percent to 533,000 yen. ($1=112.49 Yen)