| 12/9/2013 | HYIG | Moody's: Ameren Energy Generating view stable
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| 3/15/2013 | IG | Fitch: Ameren on positive watch
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| 3/14/2013 | DDHYIG | S&P upgrades Ameren
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| 2/8/2013 | DDHYIG | S&P downgrades Ameren Energy
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| 1/28/2013 | DDHYIG | Fitch downgrades Ameren Energy
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| 3/29/2012 | HYIG | Moody's may lower Ameren
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| 2/28/2012 | IG | S&P lowers AmerenEnergy to BB
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| 1/27/2012 | HYIG | Fitch lowers Ameren Genco
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| 12/5/2011 | HYIG | Moody's may cut AmerenGenco
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| 5/23/2011 | IG | Fitch downgrades Ameren
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| 3/1/2011 | HYIG | Moody's drops Ameren Genco to junk
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| 12/15/2010 | IG | S&P: AmerenEnergy now negative
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| 12/1/2010 | IG | Moody's may cut AmerenGenco
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| 7/30/2010 | IG | Fitch downgrades Ameren
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| 7/22/2010 | IG | Moody's cuts Ameren Energy view to negative
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| 11/13/2009 | IG | Fitch rates Ameren Energy notes BBB+
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| 11/12/2009 | IG | New Issue: Ameren Energy Generating $250 million 6.3% notes due 2020 yield Treasuries plus 285 bps
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| 11/12/2009 | IG | Market Commentary: Quest Diagnostics, Zimmer, Raytheon, Waste Management among day's sales; spreads ease
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| 7/31/2009 | IG | Fitch: Ameren Energy outlook negative
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| 4/24/2009 | IG | Market Commentary: Week nets $3.1 billion in new deals amid bank fears; FDIC-backed bonds trade at high volume
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| 9/11/2008 | BKHYIG | S&P ups Ameren subsidiaries from junk
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| 5/21/2008 | IG | Moody's cuts Union Electric, puts Ameren on review
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| 4/4/2008 | IG | New Issue: Ameren Energy Generating prices $300 million 7% 10-year senior notes
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| 4/4/2008 | IG | Market Commentary: Ameren leads light action with two note offerings totaling $637 million; coming week seen busy
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| 2/12/2008 | IG | Moody's may cut Union Electric
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