Hot Stocks This Morning: KERX, TSON, ARCL, AEZS, SCEI, ZGNX

Stocks are trading lower this morning as investors fear a global economic slowdown. Weak economic data from around the world is sending the market down today. China lowered their official GDP forecast for 2012 from 8% to 7.5%. PMI data in Italy and Spain came in short of expectations. There is some strength today though as U.S. ISM and factory data both were above expectations.

The market wide sell off is quickening in mid morning trading as the Dow is down 73 points, the Nasdaq is down 27 points and the S&P 500 is down 8 points.

Keryx Biopharmaceuticals, Inc. (NASDAQ:KERX) is up 24.03% this morning at $4.5890. KERX has traded 11.3 million shares so far today, 11 times its average volume. KERX shares are up more than $1.40 a share over the past five trading days. The company has a market cap of 326.70 million.

TranS1 Inc. (NASDAQ:TSON) is up 28.35% today at $4.21. TSON has traded 1.6 million shares this morning, more than 10 times its average volume. TranS1 announced this morning that Category I code approved for AxiaLIF pre-cacral interbody fusion. This news caused the stock to gap open to $4.44 this morning and has since sold off a little bit. The company has a market cap of 111.92 million.

Archipelago Learning, Inc. (NASDAQ:ARCL) is up 21.90% this morning at $11.02. ARCL is up on heavy volume today with 4.8 million shares traded so far. ARCL shares are surging today on news that Plato Learning to buy Archipelago for $291 million. The company has a market cap of 280.39 million.

Aeterna Zentaris, Inc. (NASDAQ:AEZS) is up 21.11% today at $2.1195. AEZS has traded 8.3 million shares so far today, well above its daily average of 975 thousand shares. AEZS have jumped more than $0.50 since last Tuesday. The company has a market cap of 217.55 million.

Sino Clean Energy Inc. (NASDAQ:SCEI) is up 17.03% in early trading at $3.2299. SCEI has traded 3.4 million shares so far today, 7 times its average volume. SCEI shares have been rallying over the past few days after the company announced the results of asset and cash verification. The company has a market cap of 75.10 million.

Zogenix, Inc. (NASDAQ:ZGNX) is up 17.74% today at $2.74. ZGNX has traded 619 thousand shares so far today, well above its daily average of 487 thousand shares. ZGNX shares are up about $0.50 since last Thursday after hitting a low of $2.25. The company has a market cap of 173.34 million.