Although the S&P 500 has fallen almost 170 points this month to close at 1,177 on Wednesday, one strategist thinks it could drop further—while another thinks the index could bounce back by the end of the year.

Doug Cliggott, U.S. equities strategist for Credit Suisse, said he has lowered his year-end forecast for the S&P 500 from 1275 to 1100 because of weak current growth, a softening in August of leading indicators of future growth and, most importantly, further tightening of fiscal policy in Europe and the U.S. in the future.