@edgescape Only 1% of CDM's portfolio is in technology stocks, so while Karl says he holds Meta (NASDAQ: META), it can't be much.
Meta falls into the US subsector of "Social Technology" within the broader "Technology" (or "IT") sector, so I can't imagine Karl is classifying them as a "Communications" company - they have to be within that 1% of his portfolio that is in Tech, and even if ALL of that 1% was just Meta exposure, that's still just 1% of the portfolio, so if Meta was to double in price, it could only have a maximum +1% impact on CDM's performance. As you say, I wouldn't be trying to get exposure to Meta through CDM, best to go direct or to hold an ETF that holds the Magnificent 7, as you say.
Also, his commentary for July said that Meta and Netflix were among the largest detractors in terms of portfolio performance, so those companies helped drag CDM's performance back towards that +0.1% NTA movement that he recorded for July, which is not surprising considering the Crowdstrike outage impacted sentiment around the Tech sector in the US during July. What Karl used to do, back in the day, like 8 to 10 years ago, was scale into positions (adding as they rose) and then sell out if they dropped by 5% or more - although that 5% figure did get changed to a few different numbers I think. That strategy helped him in his first 8 years particularly when markets were relatively calm, but he did complain a while ago (during the past 10 years) that the excessive market volatility with share prices "whipsawing" up and down was shaking him out of positions that bounced back almost immediately after he sold. He admitted at the time that the strategy that had been serving him well in his earlier years was no longer working. He blamed the markets, but the read-through was that he needed to change his strategy. I don't know however if he still sells out of stocks when they fall by a certain amount, like a stop-loss. If so, perhaps he held more Meta and then sold down or out because they fell so much in July and then he ended the month holding either none or not much of the company's shares.
That's the problem - he gives commentary on what hurt or helped him DURING the month, but gives very little in the way of an end-of-month top-10-holdings list. No details of stocks sold out of the portfolio or added to the portfolio, just what hurt him and what performed relatively well (9 companies only) - the only company he was talking up appeared to be Resolute Mining (RSG), the absolutely worst performing ASX-listed West African gold miner by a country mile - RSG's one year chart looks reasonable but the real story (in terms of longer term TSRs) is in their 5 year and 10 year charts; they've come down a long way, so they have plenty of ground to make up, and they're in a very tough part of the world to do it in. I did recently add Perseus (PRU) to my SMSF - breaking my own no-West-African-gold-miners rule, but you'd have to invent a new and truly diabolical type of torture to make me invest in RSG.
Anyway, just thought I'd mention, if Karl hasn't already exited Meta, i.e. if he still DOES hold Meta, it's no more than 1% of the CDM portfolio, according to his end-of-July sector chart above.