One concentrated retail account, one frontier-tech thesis, documented in public. After five issues of promising to trim Micron, I finally did it — and then did something with the money that I'm not sure was discipline or just a spicier bet.
I finally did it. After five straight issues of writing "Micron is too big, I need to trim it" and then not trimming it, I sold half my position at Monday's close — cutting MU from about 21% of my book down to roughly 10%. The single-name risk I'd been narrating for a month is materially reduced. A bad Micron day, like the 5% drop it took Tuesday on the Samsung-driven chip selloff, no longer yanks my whole account around. That part I'm proud of.
Here's the twist, and I'm putting it up top because burying it would be dishonest: I didn't do the boring disciplined thing with the proceeds. I didn't raise cash, and I didn't buy the quality names on my watchlist. I rolled almost the entire ~$940 straight into SpaceX — the day before it joined the Nasdaq-100 — taking my SPCX stake from one token share up to a real ~12% position.
So I solved one single-name concentration and deepened a thematic one. I traded part of a profitable, proven memory winner for a newly public, aspiration-priced rocket. There's a genuine case for it. There's also a genuine case that I just swapped steak for something spicier and called it discipline. This issue is me being honest about both.
The map before the positions. ● firing ● mixed/watching ● next-wave seed ● headwind.
Monday ripped — Dow above 53,000 for the first time, chips rebounding, my book near a high. Tuesday gave some back as Samsung's merely-great earnings triggered another chip wobble. The whipsaw is the point: this is a tape that rewards owning quality and sizing it so the daily noise can't hurt you. Which is exactly the lens I used on the Micron trim.
Executed: sold half of MU (~$940) at Monday's close, cutting it from ~21% to ~10% of the book. Redeployed: the full proceeds into SPCX near ~$162, taking SPCX from a token share to roughly 12%. The result: single-name MU risk materially reduced; space-theme concentration deepened to roughly 32%. All portfolio marks remain estimates based on the supplied ledger, pending brokerage reconciliation.
Portfolio shape now: the book is less dependent on one company, but more dependent on one story. That is an improvement in single-name risk and a deterioration in thematic balance. The next discipline is not necessarily selling SPCX immediately; it is refusing to add more space exposure and rebuilding cash from future trims or contributions.
"Selling a proven winner to buy an unproven one is either the dumbest thing you can do or the whole point of frontier investing. The difference is entirely in the entry."
On paper, rotating out of Micron — a profitable memory leader with a proven AI-demand engine — and into SpaceX — a newly public, unprofitable, aspiration-priced company — sounds reckless. The actual trade is more nuanced. I harvested part of a 250%+ winner, kept half the MU position, and bought SPCX after a meaningful pullback just as the stock entered the Nasdaq-100. That gives the position a real institutional catalyst. It does not turn mechanical index demand into a valuation floor.
That's frontier logic when it works: harvest from a winner whose weight became the risk, then redeploy into an asymmetric asset whose public-market story is still being priced. But the dangerous sentence is “Micron's easy money is behind it.” I do not actually know that. I know only that MU became oversized and SPCX became newly interesting. The first fact justified the trim. The second justified a position — not necessarily the full redeployment. If this ages badly, the mistake will not be trimming Micron. It will be confusing a good destination with the only destination.
Let me grade my own trade honestly, because the win column and the worry column are both real. The MU trim itself: overdue and directionally correct. I cut a 21% position to 10% into strength, kept the thesis, and killed the risk of one name running my account. High marks. If the issue ended there, it'd be my most disciplined week yet.
But the destination is where I have to be honest with myself. The disciplined version of this trade parks half those proceeds in cash and buys a quality name on the watchlist. Instead I put nearly all of it into a single volatile IPO and pushed my space theme to a third of the whole book. I can dress that up with index inclusion and the pullback — and the entry is defensible — but I'd be lying if I said there wasn't some part of me that just wanted to own more of the rocket. The trim was risk management. The redeploy was appetite. I did both in one click and I'm not going to pretend they were the same impulse.
So here's the rule I'm holding myself to, in print: SPCX is now capped in my head at ~12%. If SPCX grows beyond the size I can defend from fundamentals rather than excitement, I trim it exactly like I trimmed Micron — no falling in love, no “but the story.” I fixed one concentration this week. I won't spend next month explaining why I let the replacement grow.
Ninety-eight days, an estimated +66%, and the trade I'd promised for five issues finally on the board: half my Micron sold, the book's single-name risk cut in half, the thesis kept intact. That part is real discipline, and I'll take the credit.
But I rolled the money into SpaceX on the eve of its Nasdaq-100 entry, and that's the honest complication. The entry was deliberate — after a pullback, into a real index-inclusion catalyst, and funded by harvested gains. The exposure is not conservative — a volatile, unprofitable IPO now sized at ~12%, with my whole space theme at ~32%. I solved a concentration and built one. Whether that was a smart asymmetric rotation or an exciting mistake depends on where SPCX goes from here, and I'll report it either way.
Next up is the real test of the whole tape: June CPI on the 14th, the Fed at month-end, and my own promise not to let the rocket become the new steak. The frontier is still the trade. This week I proved I can finally trim a winner — and gave myself a fresh reminder that where the money goes matters as much as that you moved it.
See you next Sunday, buddy. — Alex
One concentrated frontier-tech portfolio, documented in public — chips, space, power, robots, asymmetric bets, and the discipline behind the chaos.
One sharp dispatch from the frontier: what changed, what matters, what I'm watching, what the evidence changed — and what the portfolio is doing about it.
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