Portfolio diversification – is it really worth it?

In this article, Ibrahim Khan pointed out that most people forget to think much about diversification when it comes to their portfolio and, as a result, they run the risk of over-exposure to a particular element of their portfolio. This could lead to a disaster if that particular part of the portfolio performs badly.

Of course, this is very sensible thinking, and forms part of not only mainstream investment thinking, but also fits in logically with people’s mindsets. ‘Don’t put all your eggs in one basket’, as they say. However, whilst I agree in principle with the concept of diversification, I will be arguing a long-held belief of mine in this article – that diversification is not all it’s cracked up to be.

At this point, you’re probably doing what most people do (including co-founder Ibrahim) when I tell them this – give me a look worse than when you’ve just bitten into a well-hidden elaichi in your biryani. But hear me out.


As I said, I agree in theory with the concept of diversification. It’s sensible, logical, and seems like the best way to protect capital. But whilst protecting capital is important, I am of the opinion that yielding fantastic returns is even more important for most of our readership – which is the mid 20s-mid 30s range. This category of people, like me, are usually marrying, starting families, and generally in the ‘building’ phase of their life. If protecting capital is the most important thing for you, my personal view is holding cash is probably best.

So let’s say you are an investor, or potential investor, with £20,000 ready to go and build you some wealth. There’s a few options you have here, but broadly speaking, and purely in relation to shares, you could either:
1. Spread the £20,000 across anything from 7-10 shares, thus diversifying risk; or
2. Spread the £20,000 across 2-3 shares, thus concentrating risk.

So the two broad options are to diversify relatively widely (option 1), or not to diversify very much (option 2).
Whilst option 1 might logically seem the best idea, what I have found in reality is that option 2 works best for me. I’ve thought long and hard about why this might be, and of course it all could just be entirely personal. However, it’s worth relaying some of those thoughts here to encourage discussion.

If I know I’m putting relatively serious money into a particular share, my research is much better compared to if I’m putting smaller amounts of money. The definition of ‘serious’ money will depend on the individual – for some, that might be anything from £1,000 upwards; for others, it might be £15,000 upwards. The actual figure is not important point here – the crucial point I’m trying to make is that if I deem myself to be putting in an amount of money which is serious, I make better decisions. I wouldn’t necessarily say it’s a conscious thing, because any amount of money is important, but I’m naturally much harsher on my criteria when putting in a serious amount.

Compare that with option 1 – spreading the money in small parts over lots of shares. Whilst you might try to do the best possible research and find a good number of shares you really like and believe in, the reality is you probably will not find 7-10 shares that you really really like. Consequently, you end up putting money into some shares which wouldn’t be your first, second, or even third choice, even though you do like them enough to invest some money.

Forgive the facile example, but it’s a bit like going to a restaurant and ordering one of those tasting platters as opposed to a particular dish or two. I only order those platters when I’m at a restaurant I don’t know and I want to sample a wide variety of things rather than risk one or two dishes. But when I’m in a place I know, I can confidently opt for one or two dishes that I know will be fantastic. When I’m investing my own money, I don’t want to put it in a platter; I want in a smaller number of stocks that I know I like, and in which I have serious confidence to give me serious returns.

In short, I think diversification can actually lead to weakness by forcing you to choose a wider number of shares. Whilst in theory diversification decreases risk, there is an argument that by forcing yourself to cast your net wide, you are inadvertently increasing risk. Even if there are 7-10 shares that you really like (going back to option 1 above), the chances are that there will be 2-3 of those that you really really like. Thus, I see concentration of a portfolio as a sign of potential strength, and crucially, an increase in risk:reward ratio.

Risk:reward ratio

Risk:reward ratio deserves some further discussion.

For those unfamiliar with the concept, it is essentially putting numbers on how much risk compared to how much reward you think something has. So with a share for example, if you thought there was a possibility of the share price going down by 20%, but you believed it could also do 100% on the upside, your risk:reward ratio is 1:5.
I personally look for risk:reward ratio of 1:3 or more. That might be considered quite high in some quarters, but again, hear me out.

My theory, as I mentioned earlier, is that if all I want to do is protect capital, I would much rather just keep money in the bank. It’s liquid, I won’t lose anything (except maybe by inflation), and there’s virtually zero risk (save for a total collapse by the bank and the money being unrecoverable, which is extremely unlikely).

But I want more than that from my investments – I want to yield fantastic returns. As such, if I don’t see anything like at least a 1:3 risk:reward ratio, I question if it is worth associating the risk with the money I would be putting in.


I must admit that my age plays a big part in my investing style. It’s unashamedly high risk, but I am investing in order to make proper money. As a result, I invest only what I could afford to lose if disaster did strike (but of course I try to mitigate against that), but put enough in such that if I realised serious gains, it would be life-changing.

It’s a high risk, high reward strategy that seems to be working well so far. But I’m very aware of the fact that this sort of approach can only really work whilst I’m relatively young with a relatively small pot. As such, I would imagine that as my portfolio hopefully becomes larger as I get older, my investment style would naturally evolve as a result of that. What exactly it would evolve to, I’m not really sure at this point. However, it is important to recognise that this concentration of my portfolio is, I think, a key factor in potentially realising serious gains.

Risk:reward in action

Let’s go back to our earlier example and say we have now invested. Jack has opted for option 1 and diversified his £20,000 in 10 shares equally.

Jane, on the other hand, has opted for option 2 and put her £20,000 in 2 shares equally.

Let’s now look at risk:reward in action.

Jack’s portfolio performs solidly – he realised a 10% gain across 5 of his shares, a 10% loss against 4, and one of his shares incredibly gained 500%. Jack’s portfolio is now worth £30,200.

Jane also happened to invest in the share that did 500%. However, her other share did not do well and she had to sell at a 30% loss. Jane’s portfolio is now worth £57,000.

Of course, we could give hundreds and thousands of permutations for these types of portfolios, but that would not be a fruitful use of time. The point I’m trying to make is that whilst Jack’s portfolio might be more resistant to losing money, he also wouldn’t gain much either simply because his money is too far spread out. Even though one of his shares did 500%, he ‘only’ realised a net 50% gain in his portfolio compared to Jane’s 285% and that was all down to his diversification.

Clearly, the downside for Jane would have been much more dramatic too. But that’s why I personally only invest in what I could afford to lose, because whilst £20,000, for example might not change Jane’s life, compounding her gains and turning that into the hundreds of thousands of pounds would change her life and set up a really strong springboard from which to work.

Diversification is for later

I really recommend reading this book. Although I read the relevant parts after I’d come to my own views, it was good to get ‘confirmation’ in a way to realise that I wasn’t totally barking mad.

In it, Allen talks about diversification being much like insurance. He argues, however, that you should only keep a small percentage of your assets in low-risk investments to give you something to fall back on if things go sour in your high-risk investments. This goes back to what I was saying earlier about only putting in what you can afford to lose.

He cites ‘the wealthiest of multimillionaires’, Carnegie, who said: ‘Put all your eggs in one basket, then watch that basket.’

And he nicely summed up my views on diversification and timing which needs no further comment from me at all: ‘There is a time to diversify and a time to concentrate. You pick a strong investment and throw your whole energy into it. Don’t dissipate your energy in a dozen different directions. Become an expert, and when you fail, learn from your failures; add this precious knowledge to your store-house and proceed to correct the mistake in the future.’

Final thoughts

So those are my thoughts on concentration of a portfolio versus diversification. I simply believe that concentration is more conducive to wealth creation; I also equally believe that diversification is strong and sensible, but is a defensive rather than offensive strategy. It does not facilitate wealth creation, but if you have already created wealth and are seeking to protect that wealth with minimal gains, diversification is wise.

I know Ibrahim will definitely have something to say, and I certainly look forward to the rest of your comments in the comments below!

Please note that the above does not constitute financial advice. You should seek the advice of a qualified, independent financial advisor for a qualified opinion. Never buy shares without conducting sufficient research.

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4 Comments. Leave new

  • I’ll approach commenting on this blog by responding to key quotes from the blog from the various sections:
    1. “If protecting capital is the most important thing for you, my personal view is holding cash is probably best.” – In the short term yes, but in the long run, say, for a pension pot, then a diversified p/f with a big chunk of fixed income yielding assets makes sense. But this point is a minor quibble and you do later point out that leaving in cash is unwise in the long run due to inflation.

    2. “I’m naturally much harsher on my criteria when putting in a serious amount.” – The reductio ad absurdum of this argument is that one should only invest in one stock as one will do the most amount of research for that stock. But of course that’s just too risky (unless you’re in the know, and know it’ll go up 100%). So one has to usually diversify. So now one shortlists the number of stocks one wants to have in the p/f depending on how risky you want it to be. Say you decide 4 is a good number. Now in terms of the weight you give to your stocks – THAT is where conviction and research should decide how much you allocate. It is broadly a separate question how many stocks you have in the pf in the first place. One may also have a criteria for a stock to even get on to one’s list. Say you want to have 10 stocks in the p/f but only shortlist 3 stocks. But that doesn’t mean you invest in 3 stocks with the full p/f amount – because that is increasing the risk you decided you weren’t happy to take. In this situation you either keep looking, or you hold in cash in low risk stuff until you find all 10 stocks. Just because you’re happy with 3 stocks doesn’t mean you go for them willynilly. You must balance the p/f carefully as well.
    Having said all that – I do agree that one should do a good amount of research in a handful of stocks rather than a little amount of research for a lot of stocks. Because ultimately markets are about data and spotting value. The better you apply yourself to finding that value, the more likely you are you will. My difference with Mohsin is that I strongly believe (a) I can be wrong; and (b) stocks are unpredictable and so I would never be comfortable going below 3 stocks in a p/f, whereas I think Mohsin would.

    2. “I’m very aware of the fact that this sort of approach can only really work whilst I’m relatively young with a relatively small pot.” – agreed. This is the crux of the matter. When you’re saving up for a mortgage and need £60k, it makes sense to go for a high risk approach: your £10k pot reducing to £8k is not a big deal and won’t really set you back too much ultimately. But the possibility of it going to £50k is really what you’re after at that point given your investment goals.

    3. “Become an expert, and when you fail, learn from your failures; add this precious knowledge to your store-house and proceed to correct the mistake in the future.” – Becoming an expert is good, but one must never aspire to be a prophet. Putting all your money into 1 or 2 stocks is really something I feel only a director or employee of a company can justify, i.e. someone with intimate knowledge of the stock.

    To conclude then: I fundamentally agree with Mohsin that a risky portfolio when young is great and makes sense. One always has time to save up after if one screws up, and if one makes it big, all the better. What I think we disagree on here is how much “conviction” should allow one to concentrate a pf. I think 3 stocks is an absolute minimum with the heaviest stock max 50% of the pf. I suspect Mohsin would disagree with that and be happier concentrating even more if he had the conviction.

  • Mohammed Sajad
    July 16, 2019 11:05 am

    Salaam Brother Mohsin

    Great article. Jazakallah

    How does one go about “researching” stocks and knowing what to invest in? I am aware some stock/shares are not halal and i would seek to avoid them at all costs, one needs to know where to gain knowledge on how due diligece is done.

    Secondly, I am aware you have published a list of debt free companies. Would it be unwise to simply look at the highest dividend yield and invest (and reinvest dividends) in the company with the best dividend track record?


    • Mohsin Patel
      July 16, 2019 11:26 am


      JazakAllah khair. To address your points in the order you wrote them:

      1) In terms of assessing sharia-compliance, I’d recommend our course (see the courses tab) to understand how to do this properly. At the very least, do a search on Wahed stock screener or similar (but note that in my experience, these apps can give false results and I think it’s best to know the methodology yourself).

      2) In terms of researching companies, this is more just a point of learning. I will write an article on this shortly outlining some interesting reading but in the meantime, probably worth listening to episode 5 of our podcast where we actually talked about this:—its-not-rocket-science-e2qnoe

      3) I can see why going for a high dividend is attractive, but I think it is ultimately unwise. The reason for that is to understand why the market is pricing that the company that way. A high dividend usually means that the share price has fallen to such a level where the dividend (which has stayed roughly the same) is now a greater % of the overall share price. E.g. if company X usually pays 5p as a dividend per share, and the share price has ticked along historically at £2.50 per share (i.e. a 2% dividend) but all of a sudden, that company is now trading at £1 a share (i.e. a 5% dividend), that looks like a much more attractive dividend yield. But why has the market allowed that to happen, i.e. why has the price dropped? Usually (not always) it’s because the market believes there is some underlying issue with the company and increased dividend yield is actually just a reflection of the fact that this is now a riskier company to be in. There are some high-yielding companies which, on research, you might find look like good solid companies and you’re happy to be in them. But it’s too simplistic to just go for a high yield.

      I hope this helps.

  • Salaam,

    Thank you for the great resources. I wonder if investing in an actively managed ETF is halal. I looked at all of its holdings and around 75% of them are shariah-compliant. However, this percentage may change daily since it is actively managed. Is it still halal to invest in and purify 25% of realized gain by giving away to charities?

    Thank you


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