Abby Joseph Cohen (born February 29, 1952) is an American economist and financial analyst on Wall Street.

[9] Following the Michael Milken fiasco and subsequent United States Department of Justice investigation into Drexel Burnham Lambert's affairs that led to the firm's demise, Cohen worked for a short time with Barclays de Zoete Wedd, then joined Goldman Sachs in New York City as a vice president and co-chair of the Investment Policy Committee in 1990, and was named a managing director in 1996 and a partner in 1998.

She is famous for predicting the bull market of the 1990s early in the decade, and was named Institutional Investor's top strategist in 1998 and 1999.

[4] CNBC referred to the market decline in March 2000 as "The Abby Effect" because she urged investors to reduce their exposure to internet stocks.

However, she was criticized for adopting a more bullish stance in August 2000, a few weeks prior to the 9/11 attacks which triggered a recession.

[9] Like most of Wall Street, she failed to foresee the extent of the financial crisis and the great Bear Market of 2008.

In December 2007, the Goldman Sachs team predicted the S&P 500 index would rally to 1,675 in 2008, the most optimistic of 14 Wall Street forecasters.