* Deal won't involve any exchange of capital-source
* Mazda to supply sports car to be sold under Fiat brand-NHK
* Mazda shares rally on news, up 2.8 pct (Adds details of plan,
Mazda share move)
TOKYO, May 23 (Reuters) - Mazda Motor Corp is in talks with Fiat
SpA to form a business tie-up, a source said, as the loss-making
Japanese automaker seeks a revival path after losing its strategic
partnership with Ford Motor Co....
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