Although we don't believe in timing the market or panicking over market movements, we do like to keep an eye on big changes -- just in case they're material to our investing thesis.
What: Shares of Oncothyreon (NASDAQ:ONTY), a developmental biotech, climbed more than 13% today, while fellow biotech stocks OncoMed (NASDAQ:OMED) and Array BioPharma (NASDAQ:ARRY) roared higher by as much as 10% and 16.4%, respectively, following a positive trial result from Puma Biotechnology's HER2-positive breast cancer therapy neratinib.
So What: Neratinib's astronomical success in a phase 3 trial for increasing disease-free survival in early stage HER2-positive breast cancer by 33 % as compared to a placebo as sent shock waves throughout the biotech industry. Wall Street's pushed stocks of fellow clinical-stage HER2-positive breast cancer drug developers higher on the day in light of the positive trial data. Array and Oncothyreon collaborate on ARRY-380, a phase 1 candidate for treating the disease, while OncoMed is developing vantictumab, which last year launched a phase 1b trial targeting HER2-positive breast cancer. OncoMed did
Now What: Puma might be looking to file for approval next year for neratinib after the success, but OncoMed, Oncothyreon, and Array are in much earlier-stage trials for their own HER2-positive cancer treatments. Still, the strong showing by neratinib has lifted confidence across the biotech sector that agents specifically targeting the HER2 growth factor have a major place as a lucrative adjuvant treatment.
While OncoMed, Oncothyreon, and Array still have a long way to go to showing similar gains from their own therapies, this is a market worth pursuing: Analysts have pegged neratinib as racking up $4 billion or more in peak sales if cleared by the FDA, with an 85% chance at regulatory approval.
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