Stocks are slipping as a listless week on Wall Street appears to be heading toward a quiet close, even as big worries continue to roil under the surface. The S&P 500 was 0.5% lower Friday and on pace for a sixth straight week where it moved less than 1%. The Dow and the Nasdaq also fell.. A report suggested sentiment among U.S. consumers is tumbling and expectations for long-run inflation are rising. That's worrisome when strong consumer spending has been helping the slowing economy from sliding into a recession. Treasury yields rose after the report.