* Stocks end week on dour note ahead of 3rd anniversary of bull market * JPMorgan, Goldman among bank reports due in coming week * S&P 500 earnings expected to rise nearly 9% in Q3 (Recasts for Friday's market declines, updates with confirmation of CPI release date, fresh analyst comments) By Lewis Krauskopf NEW YORK, Oct 10 (Reuters) – Investors will look to major banks' quarterly earnings reports in the coming week to help gauge the U.S. economy's health as the federal government shutdown has interrupted the flow of new data. Major U.S. equity indexes slumped on Friday, stalling the market's momentum, after comments from President Donald Trump ratcheted up trade tensions with China. Stocks ended the week on a dour note just before the benchmark S&P 500 is set to mark the third anniversar

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