Top Active Trader Alert Stocks (ALU, AVNR, NBG, SIGA, SOLR, YHOO)

Active traders and day traders have many stocks to choose from this Monday morning.  We are tracking news and moves in shares of Alcatel-Lucent (NYSE: ALU), Avanir Pharmaceuticals (NASDAQ: AVNR), GT Solar International, Inc. (NASDAQ: SOLR), National Bank of Greece (NYSE: NBG), Yahoo! Inc. (NASDAQ: YHOO), SIGA technologies (NASDAQ: SIGA), and Yahoo! Inc. (NASDAQ: YHOO).

Alcatel-Lucent (NYSE: ALU) is down nearly 5% after Bernstein downgraded the stock from market perform to market underperform.

Avanir Pharmaceuticals (NASDAQ: AVNR) is up nearly 7% after having a drug used to treat neurological disorders approved by the FDA. At $5.11, the stock is close to its 52-week high of $5.80.

National Bank of Greece (NYSE: NBG) is up 2% in light trading after some PM Papandreou’s decision not to call early elections.

SIGA technologies (NASDAQ: SIGA) is down more than 20% after the small business association revoked its status as a small business, making it ineligible for a desired government contract. Shares are trading at $10.52, relative to a 52-week range of $4.83-$14.38.

GT Solar International, Inc. (NASDAQ: SOLR) is making major gains premarket after the company announced that they would repurchase more than 25 million shares from investors. SOLR is up nearly 12% on average volume.

Yahoo! Inc. (NASDAQ: YHOO) is up marginally again on hopes of a deal with AOL. Shares are at $16.51, up 1.51%, On moderate volume.