Thursday’s biggest gaining and declining stocks

Orlando, FL 5/3/12 (StreetBeat) -- Shares of the following companies made notable moves in U.S. trading Thursday:

Gainers

Teradata Corp. (NYSE: TDC +4.95%) shares rose 5.3% Thursday. Earlier, the company reported strong first-quarter earnings that beat analyst estimates, as the firm revised its 2012 outlook modestly higher.

Kensey Nash Corp. (Nasdaq: KNSY +32.20%) shares jumped 32%. Dutch life-sciences company Royal DSM NV agreed to acquire the biomedical company for about $337 million in cash, at a premium of about 33%.

Scripps Networks Interactive Inc. (NYSE: SNI +6.31%) shares were up 6.4% Thursday after the parent of cable channels Food Network and HGTV reported first-quarter results that easily surpassed most forecasts on strong ad sales.

Decliners

Cablevision Systems Corp. (NYSE: CVC -5.24%) shares were down 7.3% Thursday on a first-quarter revenue figure that fell short of most analysts’ estimates. Miller Tabak cut its rating on the cable-television operator to neutral from buy, thouugh the company reported a gain in basic-video customers during the period, in contrast to peers Comcast (Nasdaq: CMCSA +0.08%) and Time Warner Cable (NYSE: TWC -0.64%), the two largest U.S. cable companies.

Prudential Financial Inc. (NYSE: PRU -8.16%) shares dropped 8.1%. Late Wednesday, financial results showed the company swinging to a first-quarter loss on charges relating to currency fluctuations and derivative impacts, mostly related to the Japanese yen’s decline against the U.S. dollar.

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Top Large Cap Tech Stocks

The following is a list of large-cap tech stocks. Judging by their earnings results relative to analyst estimates over the last year, it's clear that these tech giants are being underestimated by analysts.

To create this list, we started with a universe of large-cap tech stocks. We the collected earnings surprise data on all these stocks, and narrowed down the list to the companies that have the highest average earnings surprise rate over the last year.

How long will their winning streak continue, and how long until the good news fully priced in? Details below.

The list has been sorted by the average earnings surprise over the last year.

1. SanDisk Corp. (SNDK): Semiconductor Industry. Market cap of $8.89B. The company has outperformed analyst earnings estimates by an average of 72.46% over the last year. Short float at 7.38%, which implies a short ratio of 1.42 days. The stock has gained 75.68% over the last year.

2. Yahoo! Inc. (YHOO): Internet Information Providers Industry. Market cap of $21.05B. The company has outperformed analyst earnings estimates by an average of 63.54% over the last year. Short float at 4.77%, which implies a short ratio of 2.34 days. The stock has gained 0.62% over the last year.

3. Applied Materials Inc. (AMAT): Semiconductor Equipment & Materials Industry. Market cap of $16.54B. The company has outperformed analyst earnings estimates by an average of 62.43% over the last year. Short float at 1.8%, which implies a short ratio of 1.22 days. The stock has lost -2.75% over the last year.

4. Activision Blizzard, Inc. (ATVI): Multimedia & Graphics Software Industry. Market cap of $14.01B. The company has outperformed analyst earnings estimates by an average of 39.81% over the last year. Short float at 4.1%, which implies a short ratio of 2.02 days. The stock has gained 0.78% over the last year.

5. United Microelectronics Corporation (UMC): Semiconductor Equipment & Materials Industry. Market cap of $7.46B. The company has outperformed analyst earnings estimates by an average of 38.52% over the last year. Short float at 0.39%, which implies a short ratio of 3.75 days. The stock has lost -22.43% over the last year.

6. Apple Inc. (AAPL): Personal Computers Industry. Market cap of $275.65B. The company has outperformed analyst earnings estimates by an average of 33.25% over the last year. Short float at 1%, which implies a short ratio of 0.47 days. The stock has gained 45.17% over the last year.

7. Autodesk, Inc. (ADSK): Technical & System Software Industry. Market cap of $8.02B. The company has outperformed analyst earnings estimates by an average of 27.25% over the last year. Short float at 3.98%, which implies a short ratio of 2.86 days. The stock has gained 30.67% over the last year.

8. Intuit Inc. (INTU): Application Software Industry. Market cap of $15.1B. The company has outperformed analyst earnings estimates by an average of 25.43% over the last year. Short float at 1.98%, which implies a short ratio of 1.44 days. The stock has gained 56.72% over the last year.

9. Teradata Corporation (TDC): Diversified Computer Systems Industry. Market cap of $6.51B. The company has outperformed analyst earnings estimates by an average of 21.49% over the last year. Short float at 0.96%, which implies a short ratio of 0.93 days. The stock has gained 29.27% over the last year.

10. Rogers Communications Inc. (RCI): Wireless Communications Industry. Market cap of $20.36B. The company has outperformed analyst earnings estimates by an average of 19.99% over the last year. Short float at 3.82%, which implies a short ratio of 49.79 days. The stock has gained 17.99% over the last year.

11. Garmin Ltd. (GRMN): Scientific & Technical Instruments Industry. Market cap of $5.68B. The company has outperformed analyst earnings estimates by an average of 19.53% over the last year. Short float at 16.84%, which implies a short ratio of 13.09 days. The stock has lost -3.13% over the last year.

12. Intel Corporation (INTC): Semiconductor Industry. Market cap of $117.58B. The company has outperformed analyst earnings estimates by an average of 17.64% over the last year. Short float at 0.96%, which implies a short ratio of 0.78 days. The stock has gained 6.09% over the last year.

13. Maxim Integrated Products Inc. (MXIM): Semiconductor Industry. Market cap of $6.61B. The company has outperformed analyst earnings estimates by an average of 17.05% over the last year. Short float at 7.69%, which implies a short ratio of 6.35 days. The stock has gained 24.8% over the last year.

14. Flextronics International Ltd. (FLEX): Printed Circuit Boards Industry. Market cap of $5.29B. The company has outperformed analyst earnings estimates by an average of 16.8% over the last year. Short float at 2.61%, which implies a short ratio of 2.95 days. The stock has lost -5.6% over the last year.

15. Dolby Laboratories Inc. (DLB): Diversified Electronics Industry. Market cap of $7.21B. The company has outperformed analyst earnings estimates by an average of 16.61% over the last year. Short float at 7.3%, which implies a short ratio of 5.51 days. The stock has gained 48.84% over the last year.

16. Advanced Semiconductor Engineering Inc. (ASX): Semiconductor Equipment & Materials Industry. Market cap of $5.47B. The company has outperformed analyst earnings estimates by an average of 16.42% over the last year. Short float at 0.29%, which implies a short ratio of 4.12 days. The stock has gained 0.22% over the last year.

17. Agilent Technologies Inc. (A): Scientific & Technical Instruments Industry. Market cap of $12.2B. The company has outperformed analyst earnings estimates by an average of 16.19% over the last year. Short float at 1.68%, which implies a short ratio of 1.79 days. The stock has gained 18.83% over the last year.

18. Avago Technologies Limited (AVGO): Semiconductor Industry. Market cap of $5.89B. The company has outperformed analyst earnings estimates by an average of 16.11% over the last year. Short float at 4.45%, which implies a short ratio of 2.6 days. The stock has gained 53.08% over the last year.

19. Cree Inc. (CREE): Semiconductor Equipment & Materials Industry. Market cap of $6.11B. The company has outperformed analyst earnings estimates by an average of 16.07% over the last year. Short float at 21.78%, which implies a short ratio of 4.68 days. The stock has gained 18.11% over the last year.

20. Microsoft Corporation (MSFT): Application Software Industry. Market cap of $218.76B. The company has outperformed analyst earnings estimates by an average of 16.06% over the last year. Short float at 0.94%, which implies a short ratio of 1.14 days. The stock has lost -13% over the last year.