Should I trim my AMD position? Looking for thoughts on this portfolio reallocation

I've been invested in AMD for close to 5 years now. It started the year at roughly 25% of my portfolio, but it has since ballooned to over 50%.

My thesis is still intact and I remain bullish on AMD. That said, I've developed an unhealthy obsession with checking its share price every day since it has never felt this volatile before, and the concentration is starting to get to me mentally.

There's no capital gains tax if I trim here, so the question is purely about portfolio construction.

Here's the reallocation I'm considering:

**Before:** AMD \~50% of portfolio

**After:**

* AMD: \~12.5% of portfolio
* [SMH.L ETF](https://www.vaneck.com/offshore/en/investments/semiconductor-etf/overview/): \~12.5% of portfolio (London-listed version of SMH; AMD carries roughly 12% weighting in the fund based on latest holdings)
* Non-semiconductor stock(s): \~25% of portfolio