Had this question in my mind for some time so decided to finally do some quick research on what sector concentration looks like in other developed nations. Let's first start with ASX. Below sector allocations 1) ASX 300 index: Vanguard VAS ETF fact sheet. Link here At 36% financials doesn't look very diversified. Let's see what Hong Kong - The Heng Seng index sector allocation looks like. 2) Heng Seng Index: You can find more details about this index here At 48% financials with another 10% in properties and construction this index is not much diversified at all. The information technology sector at 12.30% consists of 1 company Tencent which is around 10.75%. Let's move to Canada. 3) Vanguard FTSE Canada All Cap Index ETF (VCN.TO): Link here Financial sector at 38.5% doesn't look any better than ASX. Finally, we move to UK index 4) FTSE 100 ETF (VUKE) : Link here This one seemed to be bit more diversified compared to the other indexes. But technology sector seemed to be very small so plenty of room to grow. I have purposely excluded US as we know it is a very well diversified index. But just for completion and to compare with other nations below is the US Total Stock Market sector weightage. I wish to add similar information about other developed/developing nations as time permits but if anyone else is interested feel free to add it here for everyone to benefit. Cheers, Oracle.