SanDisk the Year's Biggest Winner So Far Among Nine Companies Set to Report

NEW YORK (TheStreet) -- Profiling companies before they report quarterly earnings has become more difficult following Federal Reserve Chairwoman Janet Yellen's comments on Tuesday that valuations on small-cap, social-media and biotech stocks may be stretched.

Yellen made similar comments during a recent press conference, and her remarks are one reason I have added price-to-earnings ratios and dividend yields to my analysis. Both metrics give investors a sense of a stock's valuation.

Most of the nine stocks profiled today have been volatile this year. The stocks with the biggest year-to-date gains in today's "crunching the numbers" tables are SanDisk  (SNDK), with a gain of 50%; Baker Hughes (BHI), up 32%; and AutoNation (AN), up 22%.

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The biggest loser year to date is Mattel (MAT), down 18%.

Let's take a look at the stock profiles and the "crunching the numbers" tables follow:

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