Shares of Lam Research ( LRCX) were among technology's losers Thursday, tumbling 13% after the chip-equipment maker posted better-than-expected second-quarter results but offered a disappointing forecast.

For the quarter ended Dec. 24, the company earned $167.3 million, or $1.15 a share, on revenue of $633.4 million. Analysts polled by Thomson Financial expected earnings of $1.11 a share on revenue of $620.8 million. During the year-earlier period, Lam earned $77.8 million, or 55 cents a share, on revenue of $358.2 million.

Looking ahead, Lam predicted third-quarter earnings of $1.03 to $1.07 a share, with revenue of $635 million to $650 million. Analysts project earnings of $1.12 a share on revenue of $633.5 million. Shares were trading down $7.57 to $46.56.

Hoku Scientific ( HOKU) zoomed 75% after its Hoku Materials unit signed a contract to supply Sanyo Electric with polysilicon. The deal, which will occur over a seven-year period, is worth about $370 million to Hoku. Hoku said that it would build a plant capable to producing some 2,000 metric tons of polysilicon per year, which could cost as much as $260 million to build. Shares of Hoku Scientific recently were up $2.32 to $5.42.

Shares of Apple ( AAPL) gave back recent gains even after the computer and iPod maker posted blowout first-quarter results. For the period ended Dec. 30, the company earned $1 billion, or $1.14 a share, on revenue of $7.12 billion. Analysts expected earnings of 78 cents a share and revenue of $6.42 billion. A year earlier, Apple earned $565 million, or 65 cents a share, on revenue of $5.75 billion.

For the second quarter, Apple sees earnings of 54 cents to 56 cents a share and revenue of $4.8 billion to $4.9 billion. Analysts project earnings of 60 cents a share on revenue of $5.22 billion. Shares, which had run up to an all-time high ahead of the report, recently were down $4.38 to $90.57.

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