I did research in the biotech field for eight years and I thought my experience would give me an edge in investing in the sector. While I had a few successes where I doubled or tripled my money, I also had a number of failures where I lost the majority of my investment. I came to two conclusions that have convinced me to stay away from biotech.
1) Phase 1 and 2 trials are generally too small to be statistically accurate. Many times drug trials show great promise in the first two phases only to fail once a larger population is tested.
2) The FDA is completely unpredictable and sometimes makes decisions that are contrary to the scientific evidence, probably for political reasons.
I would still consider investing in a biotech company, but only from a value approach, and not by betting on a new drug or technology.