World Index Is Up 14% This Year, and Its Biggest Winners Are Not In It
The MSCI World Index returned 10.52% over the first seven months of 2026, and the iShares tracker showed a total return of 14.04% through 7 August after a strong opening week to the month. Over twelve months the index is up 20.88%.
For a global benchmark that is a solid year. It is also a misleading one, because the best-performing stock markets on earth in 2026 are not in it.
Seventy-two percent of the world is America
MSCI World covers 1,282 companies across 23 developed markets, worth $89.5 trillion. The United States accounts for 72.03% of the index. Japan is second at 5.73%, followed by the United Kingdom at 3.61%, Canada at 3.41% and France at 2.44%.
The ten largest holdings make up 26.41% of the whole index, and every one of them is American. Nvidia sits at 5.18%, Apple at 5.07%, Microsoft 3.66%, Amazon 2.94%, the two Alphabet share classes 4.16% between them, Broadcom 1.96%, Meta 1.37%, JPMorgan 1.05% and Micron Technology 1.04%. Information technology alone is 28.87% of the index.
Three stocks did much of the work
Inside the S&P 500, which supplies nearly three-quarters of the World index, Nvidia contributed 1.49 percentage points of this year’s return, Micron Technology 1.13 and Apple 1.05.
Those companies carry smaller weights globally than they do in the US index. Scaling for that, the trio accounts for roughly 2.8 percentage points of the World index return, or close to a fifth of it.
Micron is the newcomer among them. It is now a top-ten global holding after a gain of more than 200% this year, driven by DRAM and high-bandwidth memory prices rather than by anything specific to Nvidia’s order book.
Europe and Japan are not dead weight
Outside America the contribution is real but modest. ASML, at roughly 0.7% of the index, is the largest non-US technology holding, and Japanese equipment makers including Advantest, Tokyo Electron and Lasertec have moved with the same memory cycle. Europe’s Stoxx 600 reached a fresh 52-week high in early July on resilient earnings and buying in defensive sectors. None of that shifts the arithmetic much when Japan, the UK, Canada and France combined are barely 15% of the index.
Best markets of 2026 sit outside the index
Here is the awkward part. MSCI Emerging Markets returned 20.27% year to date through July, roughly double MSCI World. The iShares South Korea ETF has gained more than 70% this year and the Taiwan ETF close to 50%.
Neither market is in MSCI World. MSCI still classifies South Korea and Taiwan as emerging, so a World tracker owns no Samsung Electronics, no SK Hynix and no TSMC. Those three companies now account for more than 30% of the emerging markets index on their own, and Korea and Taiwan together make up around 51% of it.
Investors in a global developed-market fund therefore hold the American end of the memory and AI trade through Nvidia, Micron and Broadcom, and none of the Asian end that has done better.
To sum it up
Valuation reflects the gap. MSCI World trades at 18.76 times forward earnings against 10.35 times for emerging markets, and at 24.25 times trailing earnings against 17.72.
The diversification is thinner than the name suggests. A World tracker is roughly three-quarters American, a quarter concentrated in ten technology-heavy names, and exposed to one memory-driven capital cycle from a single side. The other side has been the better trade in 2026, and the more violent one with it: the Kospi fell 20% from its June peak and triggered circuit breakers more than once in early July.
This article is for information only and is not investment advice.
