When one rocket does most of the lifting
Baron Partners’ BPTRX and BPTIX funds have leaned so hard into SpaceX that the startup has become the star of the show. That’s great when the rocket is soaring, but a lot less charming when the stock market mood turns and the fund gets dragged around by a single name.
The good kind of problem — until it isn’t
For years, that SpaceX exposure helped the funds post standout long-term returns. The catch? Concentration cuts both ways. In 2026, as SpaceX and Tesla both fell, the funds got a fresh reminder that “high conviction” can sometimes rhyme with “please don’t look at the chart today.”
Why investors should care
This isn’t just a Baron problem; it’s a lesson in private-asset concentration more broadly. When a fund’s biggest winner is also its biggest risk, you can get:
- blockbuster upside when the bet works
- outsized swings when sentiment turns
- a portfolio that’s a lot less diversified than it looks on the brochure
Big picture: if you own a fund like this, you’re not just buying management skill — you’re also making a very specific bet that one moonshot keeps launching.