Does money lose value because a) inflation or b)we could invest money now and gain interest on it, or it's a combination of both

I always found this basic concept to be confusing. In school we were always taught that $100 now could be invested in order to get more money in the future through interest rates. Thanks!

5 Comments
 
Best Response

If this is a serious question:

-Money "loses value" over time because of inflation. I pay $1 for a yogurt today and I may pay $2 for a yogurt 20 years from now, so in terms of the amount of yogurt $1 can buy, the value of a dollar was cut in half. The concept here is that the only thing that matters is the amount of "real" stuff I can exchange a dollar for. The amount of "real stuff" I can exchange a dollar for generally falls over time, which is called inflation.

-The other concept which I'd say is actually quite different is opportunity cost. When I am considering an investment in X, I have to evaluate the return I expect from that investment based on the return I can get from investing in different projects A, B, C, etc. Expected inflation will be a part of the expected future return on an investment, but in this context what I really care about is the rate I can earn on alternative investments, which usually (hopefully!) will be higher than inflation.

So basically these are distinct concepts. Money doesn't lose value because I could have made money if I made a certain investment. But when considering making an investment the expected future return on alternative options is the benchmark to have in mind. In other words, in making investments the value of a dollar today vs tomorrow should be discounted at a rate considering opportunity cost, not inflation only.

 
"Extelleron"Money "loses value" over time because of inflation

Also due to the cognitive processes and risk assessment of most (likely all) living beings. The time value of money is conceptually rooted much more in consciousness of mortality and the uncertainty of the universe than it is rooted in inflation.

And decay and entropy - don't forget entropy.

That is a key reason why gold has been a store of value for so long in human history. It does not decay, it does not putrefy, it does not rust.

Those who can, do. Those who can't, post threads about how to do it on WSO.
 

Sit quis aperiam blanditiis illo nisi ut. Commodi rerum voluptatibus et fugiat.

Praesentium temporibus harum error et. Suscipit aliquam laborum modi voluptates ducimus. Perspiciatis quasi eos distinctio modi quam alias.

Career Advancement Opportunities

July 2026 Investment Banking

  • Evercore 01 99.4%
  • Moelis & Company 01 98.9%
  • JPMorgan 01 98.3%
  • Guggenheim Partners 01 97.7%
  • Morgan Stanley 07 97.1%

Overall Employee Satisfaction

July 2026 Investment Banking

  • Moelis & Company No 99.4%
  • Evercore No 98.9%
  • Morgan Stanley 01 98.3%
  • BMO Capital Markets 12 97.7%
  • Banco Santander 01 97.1%

Professional Growth Opportunities

July 2026 Investment Banking

  • Evercore 01 99.4%
  • Moelis & Company 01 98.9%
  • Morgan Stanley 06 98.3%
  • Goldman Sachs 01 97.7%
  • JPMorgan 01 97.1%

Total Avg Compensation

July 2026 Investment Banking

  • Vice President (15) $434
  • Associates (46) $258
  • 3rd+ Year Analyst (8) $210
  • 2nd Year Analyst (22) $179
  • Intern/Summer Associate (13) $156
  • 1st Year Analyst (79) $150
  • Intern/Summer Analyst (73) $101
notes
16 IB Interviews Notes

“... there’s no excuse to not take advantage of the resources out there available to you. Best value for your $ are the...”

Leaderboard

1
redever's picture
redever
99.2
2
Secyh62's picture
Secyh62
99.0
3
kanon's picture
kanon
99.0
4
BankonBanking's picture
BankonBanking
99.0
5
CompBanker's picture
CompBanker
98.9
6
Betsy Massar's picture
Betsy Massar
98.9
7
dosk17's picture
dosk17
98.9
8
GameTheory's picture
GameTheory
98.9
9
DrApeman's picture
DrApeman
98.9
10
Jamoldo's picture
Jamoldo
98.8
success
From 10 rejections to 1 dream investment banking internship

“... I believe it was the single biggest reason why I ended up with an offer...”