By Steve Cordasco and Jason Mardinly
NEW YORK (TheStreet) -- One of the worst mistakes I see investors make is to automatically equate investment performance with total account value.
They tear open the monthly statement, look at the principal and immediately judge the performance of their investments based on which way the bottom line moved.
Then they compound that mistake by making reallocation decisions based on this information in an attempt to "fix" the perceived problem (or chase illusory profits).
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