Compounding
The snowball effect of returns earning further returns — its power grows explosively the longer the time, the core principle of long-term investing.
In plain terms
Compounding is the effect of "returns begetting returns." If $1M earns 10% to become $1.1M, the next year another 10% is added on the $1.1M base. Returns pile on returns, growing like a snowball.
The key is "time." It is slow at first, but grows explosively the longer the time. So starting early and leaving it long is compounding's greatest power.
What it tells you
Compounding explains "why long-term investing is powerful." Even a return that seems trivial in the short run makes an enormous difference when it piles up over time.
So compounding tells you that "how long and consistently you keep it growing" matters as much as "how high a return you earn." A big loss in the middle breaks the chain of compounding.
Formula
compounding = the return the principal earned gets added back to the principal, and further return is earned on top e.g. at 10% a year, the principal roughly doubles in about 7 years (growing far faster than simple interest)
What high or low means
The higher the return, and the longer the period, the bigger the compounding effect. Its power especially grows exponentially as the period lengthens.
Conversely, a big loss is fatal to compounding. Lose 50% and you need to earn 100% just to break even, so "protecting" is the way to keep compounding alive.
Compounding is not magic; it needs "time." Expecting big compounding in a short span easily leads to reckless bets. Compounding's friend is patience, not haste.
Chasing high returns and taking a big loss makes compounding work in reverse (losses compound too). So "not losing" is as important as a high return.
Warren Buffett's fortune is the most famous demonstration of compounding's power. Most of his enormous wealth actually grew after he passed age 60. He invested from early on, but compounding grows explosively as time piles up.
Buffett likened his success to "rolling a snowball" — what matters is not the small initial snowball but rolling it without stopping down a long enough hill (time). It is a story showing why starting early and leaving it long is so powerful.
Metrics to read alongside
See it in real stocks
Search US stocks on Stocklore to see Compounding and other financial metrics alongside the sector average.
This explanation is for information and reference only and is not a recommendation to buy or sell any security. Investment decisions and their consequences are your own.