BUZZ-Iron ore miners: Spot iron prices fall
** Shares of Cliff Natural Resources Inc shares down 5 pct at $15.21
** Rio Tinto Ltd down 3.5 pct at $53.76
** Vale SA down 3.2 pct at $13.24
** BHP Billiton Ltd down 1.8 pct at $68.35
** Spot iron ore hits two-year low
** On course to fall to its lowest since 2009 as tighter credit in China curbs purchases of imported cargoes
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