Nikkei loses over 2 pct on Spain bank worries, yen

* Brokerages hit by fears over health of Spain's banks
* Hitachi Construction plunges on Asia slowdown worries
* Nikon skids on strong yen, Nomura downgrade

By Sophie Knight
TOKYO, May 18 (Reuters) - Japan's Nikkei share average slid
more than 2 percent on Friday and was on course for a seventh
straight week of losses, as worries about Spain's banking sector
hammered financial shares and a stronger yen kicked down
exporters such as Toyota Motor.
The Nikkei was down 2.3 per

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