The market is having a bad day so far: the Nasdaq has declined 0.3%; the S&P 500 has fallen 0.5%; and the Dow has slipped 0.5%.

The Semiconductors sector (XLK) is down 0.5%, underperforming the market overall. The current biggest movers in the sector are:

Company Market Cap Percentage Change
JA Solar Holdings Co., Ltd (Nasdaq:JASO) $843.3 million +4.3%
Magnachip (NYSE:MX) $510.3 million +3.2%
Veeco Instruments (Nasdaq:VECO) $1.13 billion -3%
Mellanox (Nasdaq:MLNX) $2.46 billion +2.8%
Park (NYSE:PKE) $513.4 million +1.5%
International (NYSE:IRF) $1.21 billion +1.5%
Freescale Semiconductor Holdings (NYSE:FSL) $2.71 billion -1.4%

Broker Summary: Charles Schwab Online Brokerage

JA Solar Holdings Co., Ltd (Nasdaq:JASO) has increased to a share price of $4.35, a 4.3% rise. The company's volume for the day so far is 272,284 shares. This is on pace to reach yesterday's trading volume of 457,255 shares.

Increasing 3.2%, Magnachip (NYSE:MX) is trading at $14.65 per share. With 140,825 shares changing hands so far today, the company's volume is 0.4 times the current three-month average.

Veeco Instruments (Nasdaq:VECO) is currently trading at a share price of $28.11, a 3% decline. So far today, 174,334 shares have changed hands.

Mellanox (Nasdaq:MLNX) has risen 2.8% to hit a current price of $59.86 per share. At 246,623 shares, the company's volume so far today is 0.2 times the average daily volume.

Park (NYSE:PKE) has moved up 1.5% and is currently trading at $25.05 per share. So far today, the company's volume is 14,844 shares. This is a sign that there will be less trading activity than there was yesterday.

After an increase of 1.5%, International (NYSE:IRF) has reached a current price of $17.81. So far today, the company's volume is 93,917 shares, 0.2 times its average over the past three months.

Freescale Semiconductor Holdings (NYSE:FSL) is trading at $10.77 per share, down 1.4%. The company is currently trading a volume of 183,696 shares.

The Bottom Line No matter the economic climate, Wall Street will always have stocks that make major moves each week. It is important to weigh current activity against historical performance when making any investment decisions. Tools like valuation ratios and profit margins, however, are only as useful as the context you put them in; remember to take historical data and competitor performance into account.

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