It is wise for investors “to be fearful when others are greedy and to be greedy only when others are fearful,” according to one of Warren Buffett’s classic aphorisms.
But it’s not easy to pinpoint the mood on the Street.
Markets are notoriously unpredictable, propelled by “animal spirits,” as the economist John Maynard Keynes termed the irrational forces shaping investor behavior. You could look at the Dow or the S&P 500 to get a general sense whether stocks are up or down, but those numbers won’t tell you why stocks are
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