3. The model upgraded exchange operator NYSE Euronext, which released quarterly results Tuesday, to "hold." The numbers: NYSE Euronext swung to a fourth-quarter profit of $172 million, or 66 cents a share, from a loss of $1.3 billion, or $5.07, a year earlier. Revenue decreased 6.9% to $1.1 billion. NYSE Euronext's operating margin ascended from 18% to 19%. A quick ratio of 0.5 indicates weak liquidity. However, the company's 0.4 debt-to-equity ratio is less than the industry average, reflecting conservative leverage. The stock: NYSE Euronext advanced 16% during the past year, trailing major U.S. indices. The shares are cheap relative to those of financial-services peers based on projected earnings and sales. They are costly when considering trailing earnings and book value. NYSE Euronext has a PEG ratio, a measure of value relative to growth, of 0.2, implying that its shares are undervalued. The industry average is 0.7. 4. The model downgraded electric utility FPL Group to "hold." The numbers: Fourth-quarter profit dropped 15% to $348 million, or 85 cents a share, as revenue decreased 8.6% to $3.7 billion. FPL's operating margin narrowed from 19% to 15%. FPL holds $238 million of cash and $19 billion of debt. Its 1.5 debt-to-equity ratio is higher than the industry average, indicating excessive leverage. FPL's 0.4 quick ratio demonstrates weak liquidity. The stock: FPL fell 9% during the past year, trailing major U.S. indices. The shares are cheap relative to those of electric utility peers based on all of our valuation measures, including trailing earnings, projected earnings, book value, sales and cash flow. The stock's PEG ratio of 1.2 indicates that FPL is expensive relative to growth expectations. Still, that figure is well-below the industry average of 4.