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Among Kass' reasons for not liking the market: Investors are too optimistic about corporate profits, economic growth will be slower than expected, and momentum from 2013's 29 percent gain will be impossible to maintain.
"In essence, the unexpected rise in stock prices in 2013 borrowed from 2014," Kass said.
As a result, he believes fair value for the S&P 500 is closer to 1,645, which would represent about a 9 percent downturn from present levels.
While the market's being due for a substantial pullback is not an uncommon view, one that the full-year outlook is bleak is not widely shared.
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Though S&P Capital IQ strategists have been warning for some time of a retreat—before a sharp turn higher—the firm softened its stance Thursday, saying that the market "continues to confound and frustrate those underallocated to stocks."
In a note, S&P said the market's ability to hold support levels after the recent decline points to the "500" moving past 1,850 and to a 1,919 potential resistance zone.
"We chalk up the recent low as another occurrence of marking the point where the price damage was primarily over and where it was prudent to call for a swing low," S&P Capital said. "The weekly S&P 500 chart continues to suggest to us that the recent decline was just a correction within the larger uptrend."
Some experts, including noted chartist Tom DeMark, have found signs that are not encouraging but rather eerily reminiscent of a market behaving much like the one in 1929, just before the crash that kicked off the Depression.
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"The scale makes the comparison to 1929 with the present stock market chart pattern appear eerie," Jeffrey Saut, chief strategist at Raymond James, said in a note Thursday. "However, if you index that same chart so that you are comparing apples to apples, the correlation to 1929 disappears."