General Motors and Facebook Headline Wednesday's Earnings

NEW YORK ( TheStreet) -- Today's buy-and-trade earnings previews focus on General Motors ( GM) which reports premarket Wednesday and Facebook ( FB) which reports in afterhours Wednesday.

We look at nine companies in seven sectors; three from the computer and technology sector and one each in these sectors; autos-tires-trucks, business services, construction, consumer discretionary, oils-energy and transportation.

The ValuEngine valuation warning remains in place with 77.8% of all stocks being overvalued, 47.28% by 20% or more. 15 of 16 sectors are overvalued by double-digit percentages, 11 by 21% to 27.2%.

The auto-tires-trucks sector is 26.5% overvalued with an underweight rating. Of the 96 stocks in this sector 40.6% have sell or strong sell ratings.

The business services sector is 25.5% overvalued with an equal-weight rating. Of the 236 stocks in this sector 61.4% have hold ratings.

The computer and technology sector is 24.4% overvalued with an overweight rating. Of the 1153 stocks in this sector 48% have buy or strong buy ratings.

The construction sector is 18.5% overvalued with an underweight rating. 55.7% of the 158 stocks in this sector have sell or strong sell ratings.

The consumer discretionary sector is 26.2% overvalued with an equal-weight rating. Of the 400 stocks in this sector 83% have hold ratings.

The oils-energy sector is 10.5% overvalued with an underweight rating. Of the 553 stocks in this sector 32% have sell or strong sell ratings.

The transportation sector is 26.3% overvalued with an 'avoid-source of funds rating. Of the 176 stocks in this sector 73.3% have sell or strong cell ratings.

Only two of the nine stocks in today's table have buy ratings. Five have hold ratings and two have sell ratings. My headline stocks are undervalued by 7.2% and 4.3%, while six are overvalued by 21.7% to 61.2%. One is down 38.0% over the last 12 months, while seven have gains between 22.6% and 643.4%. Only one stock is below its 200-day simple moving average with eight above which reflects the risk of reversion to the mean.

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