Biotech Frothiness

 | Mar 29, 2015 03:37AM ET

When Fed Chair Janet Yellen commented last July about biotechs whose valuations were “substantially stretched,” we took it with a grain of salt. High valuations in the space are normal, and after a very healthy correction last April, we thought the space still had room to run.

Now, however, we seem to be in the midst of genuine frothiness in biotechs. When we see valuations pricing in the assumed success of drugs that are currently in Phase 1 trials, we know something is amiss. Remember that Phase 1 is the earliest clinical stage, with about an 80 percent chance that the drugs will ultimately fail to be efficacious, or that they will be derailed by side-effects.

If a stock’s valuation is pricing in a 100 percent chance of success for a Phase 1, that’s froth, pure and simple.

We have seen such euphoria not just in smallcap biotechs, but even in their mid- and big cap brethren. Recent price action in the biotech index ETF (iShares NASDAQ Biotechnology Index, NASDAQ: IBB) shows that the market may be coming to its senses: