[freerobby]

Yeah, this is closer to how I got here (cost basis is way more than 2%, but nowhere near 25%). As you hint at though, there's a cognitive bias in holding my position by this reasoning -- my gains are a "sunk benefit" and I am where I am regardless of how I got here.

For me, it boils down to two things:

1. I'm pretty conservative with the rest of my money (index funds, rental property). If Tesla went bankrupt tomorrow, I'd be fine. Don't get me wrong -- it'd be a bad day. But the financial hit wouldn't threaten my long-term happiness.

2. I only buy individual stocks when I feel the market has wildly misjudged a company. Tesla fit this to a tee, particularly (but not exclusively) in the early days. I took a large early position and have been buying dips along the way (yes, still). By my judgment, a dollar invested in Tesla still has a much higher expected value over 10 years than a dollar invested in any other equity that I feel qualified to assess. I would love to diversify the highly aggressive part of my portfolio, but hard as I try, I cannot find a deal this good in any other public company. So I've decided how much I'm willing to lose on what I believe is a great bet, and have invested accordingly.

[marvin]

I agree with your reasoning.