Shares of Mizuho Financial Group fell over 7% Monday, after the company said it has not made decision yet on investment in Rakuten Bank.

Shares of Mizuho Financial Group fell over 7% Monday, after the company said it has not made decision yet on investment in Rakuten Bank.

Tokyo, May 20 (Jiji Press)--Mizuho Bank and Rakuten Bank will form a capital and business alliance, with the former set to acquire shares in the latter on Oct. 1, the parent…