Citigroup has revised its year-end target for the S&P 500 index upward to 6,600 points, according to PANews. Stuart Kaiser, Head of U.S. Options Strategy at Citigroup, attributes this shift in outlook to a recent surge in demand from asset management clients for shorting products related to the iShares index or junk bond indicators. This trend suggests that investors anticipate significant market shifts in the near future. While these actions may reflect macro investor expectations regarding market direction or be used as hedging tools against potential pullbacks in risk assets, Kaiser suggests a correction in the market is likely within the next three months.