Here's some possible reasons, Faramir.
Biotech stocks, particularly those with a potentially "blockbuster" discovery/product are notoriously volatile. They attract speculators, not all of whom will share ideas as to the short or longer term potential for the company's shareprice. So we should expect surges in the SP as sentiment fluctuates.
As for insiders buying and selling the shares, remember that they are restricted in the periods in which they are permitted to trade; that some of them have a significant chunk of their remuneration and personal wealth tied up in shares/options in "their" company. We shouldn't be surprised if they seek to diversify somewhat when opportunity allows.
It's a difficult sector for the non-biotech individual. Not for longterm holds IMO but more for the expert in this industry who's also prepared to temper investment decisions with a good dose of technical analysis timing.
Biotech stocks, particularly those with a potentially "blockbuster" discovery/product are notoriously volatile. They attract speculators, not all of whom will share ideas as to the short or longer term potential for the company's shareprice. So we should expect surges in the SP as sentiment fluctuates.
As for insiders buying and selling the shares, remember that they are restricted in the periods in which they are permitted to trade; that some of them have a significant chunk of their remuneration and personal wealth tied up in shares/options in "their" company. We shouldn't be surprised if they seek to diversify somewhat when opportunity allows.
It's a difficult sector for the non-biotech individual. Not for longterm holds IMO but more for the expert in this industry who's also prepared to temper investment decisions with a good dose of technical analysis timing.