Take a look at some of Tuesday’s midday movers:

Yelp – up 7 percent to a new high. Yelp went public at $15 on March 2 — today’s action represents its highest level since its IPO.

Affymax - up 4.3 percent before being halted for news — which was the U.S. Food and Drug Administration approval of its Omontys drug to treat anemia in adult dialysis patients.

Rare earth stocks are up after strong earnings from China’s largest rare earths producer — here are the stocks to watch:

Crocs – Wedbush initiates coverage at “outperform,” Crocs faces less cost inflation than competitors.

Questions? Comments? Email us at marketinsider@cnbc.com

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