Investors feeling upbeat due to recent gains in previously battered sectors should keep their portfolios diversified and their investment strategies clear, The Wall Street Journal reports.

As much as investors might want to proclaim the end of the bear market, they should not throw caution to the wind, according to the Journal. Although both the S&P 500 and the Nasdaq Composite have risen more than 21% over the past three months, investors should consider historical market returns, the economy and stock valuations, the paper reports.

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