US STOCKS-S&P, Dow hit 9-week highs after ECB comments, results
* McDonald's up as China demand recovers
* Dow Chemicals rises, boosting materials sector
* Caterpillar, 3M reverse course and rise
* Hospital operators tank
* Indexes up: Dow 1.54 pct, S&P 1.46 pct, Nasdaq 1.5 pct (Updates to early afternoon)
By Abhiram Nandakumar
Oct 22 (Reuters) - The S&P 500 and the Dow rallied to nine-week highs and were poised for their best month since October 2011, on strong corporate results and cues from the European Central Bank about extending its stimulus program.
The biggest lift to the Dow came from McDonald's, whose shares jumped 7.3 percent to $110.05, after its quarterly results beat estimates as demand recovered in China.
Dow Chemicals rose 4.9 percent to $49.81 after its results. Continuación...