Jan 21 (Reuters) -
* Moody's says placed the ratings of 11 mining companies rated in the US and their rated subsidiaries, on review for downgrade
* Moody's-increased likelihood of prices for base metals, precious metals, others to approach levels closer to Moody's stressed sensitivity scenario
* Moody's believes that downturn of mining companies will mark an unprecedented shift for the mining industry
* Moody's on mining co - strong US dollar is further factor contributing to weakening demand,driving prices lower since most metals traded in dollars
* Moody's on US mining cos - effect of slowing growth in China indicates a fundamental change that will heighten credit risk for mining companies
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