I believe in diversification , never go " all in " on any one stock , have most of my funds in the ETF IBB and my retirement in FBIOX ....and have had those positions for several years .
A little contradictory there, aintcha? Have major amounts of money in just two biotech funds that are nearly identical to each other? Curious to why you'd duplicate yourself like that - looking at a chart they track in lockstep. I have 25% of my IRA in biotechs, consider that to be a bit too much, and fully intend on reducing that level when I can profitably do so. But whatever floats your boat!
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