NEW YORK ( TheStreet) -- Siliconware Precision Industries (Nasdaq: SPIL) is trading at unusually high volume Wednesday with 5.4 million shares changing hands. It is currently at 4.4 times its average daily volume and trading up 12 cents (+2%) at $5.96 as of 3:20 p.m. ET. Siliconware Precision has a market cap of $3.61 billion and is part of the technology sector and electronics industry. Shares are up 33.9% year to date as of the close of trading on Tuesday. Siliconware Precision Industries Co., Ltd. provides semiconductor packaging and testing services worldwide. The company has a P/E ratio of 22.4, below the average electronics industry P/E ratio of 23.1 and above the S&P 500 P/E ratio of 17.7. TheStreet Ratings rates Siliconware Precision as a buy. The company's strengths can be seen in multiple areas, such as its revenue growth, largely solid financial position with reasonable debt levels by most measures and good cash flow from operations. We feel these strengths outweigh the fact that the company has had lackluster performance in the stock itself. You can view the full Siliconware Precision Ratings Report. See all heavy volume stocks in our stocks moving on unusual volume list or get investment ideas from our investment research center.