QUOTE(sgh @ Jun 27 2022, 03:09 PM)
I am curious so the criteria to determine the weightage for world global ETF is by market cap ? Does this explain why US stocks dominate the top holdings of any world global ETF?
When I think of world global ETF it should be a well represented stocks from most countries around the world and not where top holdings are all dominated by US stocks. If it is, when US market bear like now, the world global ETF take a big hit too. So for me I get each country specific ETF to represent as a world global ETF instead. iShares series of Indonesia,Thailand,South Korea,Taiwan,Australia,Canada etc.
As for why some investors have high weightage for Asia is primarily becuz of China and to some extent India. From year 2001 where I invest in FSM mutual fund and 20+ years later they have shown to be working. Unfortunately the same cannot be said of Brazil,Russia. Last time BRIC this term refer to those countries.
Lastly why is Japan so special that it is on it's own and not inside Asia? Is it again by market cap definition?
Weighing by market cap is directly representative of the market composition. Imagine you are a high roller and you go to a nasi lemak roadside stall and say "I want to buy literally everything in your stall". You don't pick a bit of each, you literally buy everything. If that day there's a lot of rice left, you'll get more rice. Weighing by market cap is like that. You naturally buy more of what's more of in the market. Most market indices are market-cap weighted. S&P 500, Nasdaq-100, DAX, KLCI, STI, etc. The weird one is Dow Jones, which is price-weighted (you buy more of what's expensive).
The impact of doing it like this, as you mentioned, is that price fluctuations are influenced by the biggest companies in the market. The S&P 500 hasn't "crashed" for the longest yet all because the largest companies hasn't crashed yet, when in fact the smaller companies have already entered bear market long time ago. The moment the contagion reaches the top companies, the S&P 500 drops like a rock.
So yes, that is why US stocks take up around 60% of most world ETFs, because it is literally 60% of the world's equity by market cap. If the world equity market is worth USD 100 Trillion, the US equity market is worth USD 60 Trillion. There is some fudging of numbers if you search online (I've calculated that US's market cap is actually 44% of global market), probably due to an "investiblility" filter that indices put. Remember that Russia was demoted to "uninvestable" by many index makers.
Another type of weighting is called "equal-weighted", where each constituent is given equal weightage in a portfolio/ETF. Examples are like the ETF RSP (S&P 500 equal weighted) and QQQE (Nasdaq-100 equal weighted). In this instance, the price fluctuations are equally impactful regardless of company size. I tend to use the equal-weighted indices as a leading indicator for the main index.
Japan usually gets a special place because it is too big and matured a market to be invested together with the rest of Asia. In terms of equity market, Japan is a developed market, while other "developed" countries like Korea and China is actually classified as Emerging Market by MSCI (one of the index makers). By market cap, Japan is almost 40% of the total Asian equity market. Some investors prefer to refine their allocation to Japan with respect to the rest of Asia, esp with Japan being famous for the "lost decade", hence products like AAXJ were created.
Most region-based ETFs that are sold in developed markets have an ex-Country ETF to control for home country overweight and tax treatment. It is common for US investors to buy VTI + VXUS instead of VT because they can better optimise for tax. In UK there're ex-UK ETFs for similar reasons.