Excluding food and energy costs , the core CPI was up 0.1 percent last month , compared to a rise of 0.2 percent in July .
Excluding food and energy costs , the core CPI is seen rising 0.2 percent , matching the July figure .
The broader Standard & Poor 's 500 Index .SPX crept up 4.3 points , or 0.44 percent , to 980.52 .