How do I calculate what percentage of my portfolio is large-, mid- or small- cap?
All mutual funds disclose their investments, funds are large cap only or midcsp etc. So it depends on what funds you choose. The portfolio manager at Value Research Online does this very nicely. It tracks the underlying holdings of each fund, yielding correct calculations for funds that invest across the board. Take a look at the screenshot from my account:  If you have direct equity holdings (e.g., not through a mutual fund), that too gets integrated. Per stock details are also visible.
Most of the “recommendations” are just total market allocations.  Within domestic stocks, the performance rotates. Sometimes large cap outperform, sometimes small cap outperform. You can see the chart here (examine year by year):  https://www.google.com/finance?chdnp=1&chdd=1&chds=1&chdv=1&chvs=maximized&chdeh=0&chfdeh=0&chdet=1428692400000&chddm=99646&chls=IntervalBasedLine&cmpto=NYSEARCA:VO;NYSEARCA:VB&cmptdms=0;0&q=NYSEARCA:VV&ntsp=0&ei=_sIqVbHYB4HDrgGA-oGoDA Conventional wisdom is to buy the entire market. If large cap currently make up 80% of the market, you would allocate 80% of domestic stocks to large cap.  Same case with International Stocks (Developed). If Japan and UK make up the largest market internationally, then so be it.  Similar case with domestic bonds, it is usually total bond market allocation in the beginning.  Then there is the question of when you want to withdraw the money. If you are withdrawing in a couple years, you do not want to expose too much to currency risks, thus you would allocate less to international markets. If you are investing for retirement, you will get the total world market.  Then there is the question of risk tolerance. Bonds are somewhat negatively correlated with Stocks. When stock dips by 5% in a month, bonds might go up by 2%. Under normal circumstances they both go upward. Bond/Stock allocation ratio is by age I’m sure you knew that already.  Then there is the case of Modern portfolio theory. There will be slight adjustments to the ETF weights if it is found that adjusting them would give a smaller portfolio variance, while sacrificing small gains. You can try it yourself using Excel solver.  There is a strategy called Sector Rotation. Google it and you will find examples of overweighting the winners periodically. It is difficult to time the rotation, but Healthcare has somehow consistently outperformed. Nonetheless, those “recommendations” you mentioned are likely to be market allocations again.  The “Robo-advisors” list out every asset allocation in detail to make you feel overwhelmed and resort to using their service. In extreme cases, they can even break down the holdings to 2/3/4 digit Standard Industrial Classification codes, or break down the bond duration etc.  Some “Robo-advisors” would suggest you as many ETF as possible to increase trade commissions (if it isn’t commission free). For example, suggesting you to buy VB, VO, VV instead a VTI. In a word, no. Diversification is the first rule of investing.  Your plan has poor diversification because it ignores most of the economy (large cap stocks).  This means for the expected return your portfolio would get, you would bear an unnecessarily large amount of risk.  Large cap and small cap stocks take turns outperforming each other.  If you hold both, you have a safer portfolio because one will perform well while the other performs poorly.  You will also likely want some exposure to the bond market. A simple and diversified portfolio would be a total market index fund and a total bond market fund.  Something like 60% in the equity and 40% in the bonds would be reasonable.  You may also want international exposure and maybe exposure to real estate via a REIT fund. You have expressed some risk-aversion in your post.  The way to handle that is to take some of your money and keep it in your cash account and the rest into the diversified portfolio. Remember, when people add more and more asset classes (large cap, international, bonds, etc.) they are not increasing the risk of their portfolio, they are reducing it via diversification.  The way to reduce it even more (after you have diversified) is to keep a larger proportion of it in a savings account or other guaranteed investment. BTW, your P2P lender investment seems like a great idea to me, but 60% of your money in it sounds like a lot. Although the market  discussion by other answers is correct, the  tax structure of many developed nations (I am familiar with Canada in particular) offers a preferred tax rate for dividend income compared to taxable gains. Consequently, if your portfolio is large enough to make transaction fees a very small percentage rate, this is a viable investment strategy.  However, as the preferred tax rate for dividends typically will catch up to that for capital gains at some cut-off point, there is a natural limit on how much income can be favourably obtained in this way.  If you believe your portfolio might be large enough to benefit from this investment strategy, talk to a qualified investment advisor, broker, or tax consultant for the specifics for your tax jurisdiction. "Like Jeremy T said above, silver is a value store and is to be used as a hedge against sovereign currency revaluations.  Since every single currency in the world right now is a free-floating fiat currency, you need silver (or some other firm, easily store-able, protect-able, transportable asset class; e.g. gold, platinum, ... whatever...) in order to protect yourself against government currency devaluations, since the metal will hold its value regardless of the valuation of the currency which you are denominating it in (Euro, in your case).  Since the ECB has been hesitant to ""print"" large amounts of currency (which causes other problems unrelated to precious metals), the necessity of hedging against a plummeting currency exchange rate is less important and should accordingly take a lower percentage in your diversification strategy.  However, if you were in.. say... Argentina, for example, you would want to have a much larger percentage of your assets in precious metals. The EU has a lot of issues, and depreciation of hard assets courtesy of a lack of fluid currency/capital (and overspending on a lot of EU governments' parts in the past), in my opinion, lessens the preservative value of holding precious metals.  You want to diversify more heavily into precious metals just prior to government sovereign currency devaluations, whether by ""printing"" (by the ECB in your case) or by hot capital flows into/out of your country.  Since Eurozone is not an emerging market, and the current trend seems to be capital flowing back into the developed economies, I think that diversifying away from silver (at least in overall % of your portfolio) is the order of the day. That said, do I have silver/gold in my retirement portfolio?  Absolutely.  Is it a huge percentage of my portfolio?  Not right now.  However, if the U.S. government fails to resolve the next budget crisis and forces the Federal Reserve to ""print"" money to creatively fund their expenses, then I will be trading out of soft assets classes and into precious metals in order to preserve the ""real value"" of my portfolio in the face of a depreciating USD. As for what to diversify into?  Like the folks above say: ETFs(NOT precious metal ETFs and read all of the fine print, since a number of ETFs cheat), Indexes, Dividend-paying stocks (a favorite of mine, assuming they maintain the dividend), or bonds (after they raise the interest rates).  Once you have your diversification percentages decided, then you just adjust that based on macro-economic trends, in order to avoid pitfalls. If you want to know more, look through: http://www.mauldineconomics.com/ < Austrian-type economist/investor http://pragcap.com/ < Neo-Keynsian economist/investor with huge focus on fiat currency effects" "Some companies issue multiple classes of shares.  Each share may have different ratios applied to ownership rights and voting rights.  Some shares classes are not traded on any exchange at all.  Some share classes have limited or no voting rights.   Voting rights ratios are not used when calculating market cap but the market typically puts a premium on shares with voting rights. Total market cap must include ALL classes of shares, listed or not, weighted according to thee ratios involved in the company's ownership structure.  Some are 1:1, but in the case of Berkshire Hathaway, Class B shares are set at an ownership level of 1/1500 of the Class A shares. In terms of Alphabet Inc, the following classes of shares exist as at 4 Dec 2015: When determining market cap, you should also be mindful of other classes of securities issued by the company, such as convertible debt instruments and stock options.  This is usually referred to as ""Fully Diluted"" assuming all such instruments are converted." That's why I said you can do a weighted average and take into account other factors. The initial average calculation is just a simple, high level average to compare betas across different listings. For a more precise calculation you would have to weigh different factors. Calculation. To calculate the DJIA, the sum of the prices of all 30 stocks is divided by a divisor, the Dow Divisor. The divisor is adjusted in case of stock splits, spinoffs or similar structural changes, to ensure that such events do not in themselves alter the numerical value of the DJIA. "It appears that there's a confusion between the different types of average. Saying ""the average investor"" generally means the most common type of small-scale unsophisticated investor - the mode (or possibly median) investor. However, while this class of investors is numerous, each of them has assets that are quite small compared to some other types of investors; and the market average performance is determined proportionally to the amount of assets held, not to the number of holders; so the performance of large investors ""counts"" that much more. For any measure, the mode of performance can be (and often is) different from the mean performance - in this case, Dalbar is saying that the most common results are lower than the (weighed) average results."