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Can I make my savings keep in check with or beat inflation over a long time period via index funds?
While nothing is guaranteed - any stock market or country could collapse tomorrow - if you have a fairly long window (15+ years is certainly long), ETFs are likely to earn you well above inflation.  Looking at long term ETFs, you typically see close to 10% annual growth over almost any ten year period in the US, and while I don't know European indexes, they're probably well above inflation at least. The downside of ETFs is that your money is somewhat less liquid than in a savings account, and any given year you might not earn anything - you easily could lose money in a particular year.  As such, you shouldn't have money in ETFs that you expect to use in the next few months or year or even a few years, perhaps. But as long as you're willing to play the long game - ie, invest in ETF, don't touch it for 15 years except to reinvest the dividends - as long as you go with someone like Vanguard, and use a very low expense ratio fund (mine are 0.06% and 0.10%, I believe), you are likely in the long term to come out ahead.  You can diversify your holdings - hold 10% to 20% in bond funds, for example - if you're concerned about risk; look at how some of the "Target" retirement funds allocate their investments to see how diversification can work [Target retirement funds assume high risk tolerance far out and then as the age grows the risk tolerance drops; don't invest in them, but it can be a good example of how to do it.]   All of this does require a tolerance of risk, though, and you have to be able to not touch your funds even if they go down - studies have repeatedly shown that trying to time the market is a net loss for most people, and the best thing you can do when your (diverse) investments go down is stay neutral (talking about large funds here and not individual stocks). I think this answers 3 and 4.   For 1, share price AND quantity matter (assuming no splits).  This depends somewhat on the fund; but at minimum, funds must dividend to you what they receive as dividends.  There are Dividend focused ETFs, which are an interesting topic in themselves; but a regular ETF doesn't usually have all that large of dividends.  For more information, investopedia has an article on the subject.  Note that there are also capital gains distributions, which are typically distributed to help offset capital gains taxes that may occur from time to time with an ETF.  Those aren't really returns - you may have to hand most or all over to the IRS - so don't consider distributions the same way. The share price tracks the total net asset value of the fund divided by the number of shares (roughly, assuming no supply/demand split).  This should go up as the stocks the ETF owns go up; overall, this is (for non-dividend ETFs) more often the larger volatility both up and down. For Vanguard's S&P500 ETF which you can see here, there were about $3.50 in dividends over 2014, which works out to about a 2% return ($185-$190 share price).  On the other hand, the share price went from around $168 at the beginning of 2014 to $190 at the end of 2014, for a return of 13%.   That was during a 'good' year for the market, of course; there will be years where you get 2-3% in dividends and lose money; in 2011 it opened at 116 and closed the year at 115 (I don't have the dividend for that year; certainly lower than 3.5% I'd think, but likely nonzero.) The one caveat here is that you do have stock splits, where they cut the price (say) in half and give you double the shares.  That of course is revenue neutral - you have the same value the day after the split as before, net of market movements. All of this is good from a tax point of view, by the way; changes in price don't hit you until you sell the stock/fund (unless the fund has some capital gains), while dividends and distributions do.  ETFs are seen as 'tax-friendly' for this reason. For 2, Vanguard is pretty good about this (in the US); I wouldn't necessarily invest monthly, but quarterly shouldn't be a problem.  Just pay attention to the fees and figure out what the optimal frequency is (ie, assuming 10% return, what is your break even point).  You would want to have some liquid assets anyway, so allow that liquid amount to rise over the quarter, then invest what you don't immediately see a need to use. You can see here Vanguard in the US has no fees for buying shares, but has a minimum of one share; so if you're buying their S&P500 (VOO), you'd need to wait until you had $200 or so to invest in order to invest additional funds.