Tuesday, March 04, 2008 2:14:38 AM
All valid points. Expected value is a meaningful investment metric - but I shy away from it because I, and I suggest most investors, overestimate the probability of success in large part because of the tendency of management to see and PR the good aspects, but forget the risks. Humans focus on the data they have and the data that supports their needs - but forget or undervalue the data that they don't have or doesn't support their needs.
So I focus on risks as a way to control that. Get hard data that argues the other side. For instance I would naively give the anemia trial 50% chance of success - but I know that traditionally I give odds that are too high because (generically) I haven't considered that management was naive about eastern europe, or subgroup analysis or Program Survival Bias or ... . (these examples are not meant to be about Repros per se - just examples)
Anyway, when push came to shove, did all that brilliant thinking lead to stronger predictions - and of what? I'm genuinely asking your recall and opinion. You may just be missing the intellectual stimulus rather than risk reduction through insight?
A valid question - but see above answer. As for what I learned from looking at the data - that the interim for DNDN is risky despite it being (per Dendreon mgt) "Well powered". And that has changed my investment approach.
The bummer is that for whatever reason the negativity holds down the pps and makes funding challenging. It becomes a self-fulfilling FUD.
Agreed that the self fulfilling nature of the short attack is frustrating. What surprises me is that there aren't some successful big long funds who sort the wheat from the chaff and provide the funding for the good candidates - and then eat the shorts alive by mirroring the same tricks back on the shorts. My guess is that there just aren't enough sure-fire biotech winners to justify developing the expertise in ripping the shorts?
But frustration aside - I can't complain in that the shorts stupidly drive down good management and give me an opportunity.
Clark
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