Demurrage vs inflation
Yes, there's a difference. If you've borrowed $100, then under inflation your salary will (presumably) increase, and tomorrow your debt will only be worth $99. But under demurrage, you'll still owe $100.
It has got to do with inflation. So as prices of goods and services rise over the years you can work out what the inflation rate is over time. So by applying the inflation rate between 1990 to 2016 you can work out the equivalent value of $30B in 1990 would be in 2016. So in other words in 1990 you bought $30B worth of a box of goods and services, then in 2016 it would have cost you $55B to buy the same box of goods and services. You can play around with this US Inflation Calculator here, to see how much an amount of money back in history would be worth today if invested at the rate of inflation over those years.  So obviously, the aim in investing is to get a return higher than the rate of inflation, so that your investment funds grow in real terms and in the future you can buy more with your funds than you can buy with them today. It seems from the Bernanke and pundits in general that there's an ideal inflation rate and it's not zero. When you reference that recessions bring prices down, I think I understand you, but recession does not mean deflation. In fact deflation is a rarity, not a common occurrence.  When you look at what compounding does, you see that a 3% inflation rate will double the cost of an item in 24 years. From 1975 to 2010, inflation was 4X as it ran well above 3% for a time. I chose that date as I was 13 at the time, and wasn't too aware of specific prices before that. So I've seen a pizza go from $3 to $12 during my life. I hope to live long enough to see it double again.  I think that it's hyperinflation that's an ongoing concern, but the controlled inflation as I just described is not detrimental, in fact it's preferable in some sense. For example, when I look at my 5% mortgage, it's 3.6% after tax, but with a 3% inflation rate, my cost is really .6%, as the remaining debt devalues over time and the house (in theory) goes up with inflation. On the other extreme, higher inflation, say 8%, starts to be detrimental, distorting spending behavior and bad for the system. I have been charting the CPI reported inflation rate vs . the yeald on the 10-year T-note. Usually, the two like to keep pace with each other. Sometimes the T-note is a bit higher than the inflation rate, sometimes the inflation rate is a bit higher than the T-note yeald. One does not appear to follow the other, but (until recently) the two do not diverge from each other by much.  But all that changed recently and I am without an explanation as to why. Inflation dropped to zero (or a bit negative) yet the yeald on the 10-year T-note seemed to seek 2%.  Edit: If you give this response a downvote then please be kind enough to explain why in a comment.  Edit-2: CPI and 10-year T-note are what I have tracked, and continue to track. If you do not like my answer then provide a better one, yourself. "There are several causes of inflation. One is called cost push — that is, if the price of e.g. oil goes up sharply (as it did in the 1970s), it creates inflation by making everything cost more. Another is called demand pull: if labor unions bargain for higher wages (as they did in the 1960s), their wage costs push up prices, especially after they start buying. The kind of inflation that the banks cause is monetary inflation. That is, for every dollar of deposits, they can make $5 or $10 of loans. So even though they don't ""print"" money (the Fed does) it's as if they did. The result could be the kind of inflation called ""too much money chasing too few goods.""" I think you're missing Simon Moore's point. His point is that, due to low inflation, the returns on almost all asset classes should be less than they have been historically, so we shouldn't rebalance our portfolio or withdraw from the market and hold cash based on the assumption that stocks (or any other asset) seem to be underperforming relative to historical trends.  His last paragraph is written in case someone might misunderstand him, he is not advocating to hold cash, just that investors should not expect as good returns as has happened historically, since those happened in higher inflation environments. To explain: If the inflation rate historically has been 5% and now it's 2%, and the risk-free-market return should be about 2%, then historically the return on a risk-free asset would be 7% (2%+5%), and now it should be expected to be 4% (2%+2%). So, if you have had a portfolio over some time you might be concerned that the rate of return is worsening, but Simon's point is that before you sell off your stocks / switch investment brokers, you should try to figure out if inflation is the cause of the performance loss. On the subject  of cash: cash always loses value over time from inflation, since inflation is a measure of the increase in prices over time-- it's a part of the definition of what inflation is.  That said, cash holdings lose value more slowly when inflation is lower, so they are relatively less worse than before. The future value of cash doesn't go up in low inflation (you'd need deflation for that), it just decreases at a lower rate, that is, it becomes less expensive to hold- but there still is a price. As an addendum, unless a completely new economic paradigm is adopted by world leaders, we will always see cash holdings decrease in value over time, since modern economics holds that deflation is one of the worst things that can happen to an economy. Inflation can be a misleading indicator. Partly because it is not measured as a function of the change in prices of everything in the economy, just the basket of goods deemed essential. The other problem is that several things operate on it, the supply of money,  the total quantity of goods being exchanged, and the supply of credit. Because the supply of goods divides - as more stuff is available prices drop - it's not possible to know purely from the price level, if prices are rising because there's an actual shortage (say a crop failure), or simply monetary expansion. At this point it also helps to know that the total money supply of the USA (as measured by total quantity of money in bank deposits) doubles every 10 years, and has done that consistently since the 1970's.  USA Total Bank Deposits So I would say Simon Moore manages to be right for the wrong reasons. Despite low inflation, cash holdings are being proportionally devalued as the money supply increases. Most of the increase, is going into the stock market. However, since shares aren't included in the measures of inflation, then it doesn't influence the inflation rate. Still, if you look at the quantity of shares your money will buy now, as opposed to 5 years ago, it's clear that the value of your money has dropped substantially.  The joker in the pack is the influence of the credit supply on the price level. Inflation data is a general barometer for inflation that a typical consumer would experience.  Generally when calculating inflation for yourself you would only include items that you use and in percentages of your budget.   Personal inflation is much more useful when attempting to calculate safe withdrawal rates or projections into the future. Line one shows your 1M, a return with a given rate, and year end withdrawal starting at 25,000.  So Line 2 starts with that balance, applies the rate again, and shows the higher withdrawal, by 3%/yr.  In Column one, I show the cumulative effect of the 3% inflation, and the last number in this column is the final balance (903K) but divided by the cumulative inflation.  To summarize - if you simply get the return of inflation, and start by spending just that amount, you'll find that after 20 years, you have half your real value.  The 1.029 is a trial and error method, as I don't know how a finance calculator would handle such a payment flow. I can load the sheet somewhere if you'd like.  Note: This is not exactly what the OP was looking for. If the concept is useful, I'll let it stand. If not, downvotes are welcome and I'll delete.