After putting in a high at 9016, the Nikkei has retreated into negative territory with banking stocks tumbling as worries about bank shareholding losses are re-ignited. Banking stocks such as Sumitomo Mitsui is down 13.5% and Mizuho down 9.3%. The loss today by Sumitomo Mitsui, forcing them to raise $8 bio has sent shock waves through the banking sector.