Amid the heat of battle, Fitch entered the scene announcing it was placing Southern Union on rating watch negative given uncertainty over its future corporate structure.

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The Fitch ratings agency warned that if Greece did leave the euro, it would probably place all 16 remaining euro nations' sovereign ratings on "rating watch negative" - meaning they would be in danger of being downgraded.

BBC: Greece bailout crisis: President seeks unity government

According to the indicators I watch, negative sentiment is at a level which usually leads to a strong move to the upside.

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