Compound Interest and Long-Term Investing — Why Time Beats Timing

How Compounding Works

Compounding is the process of earning returns not just on your original investment, but on the accumulated returns from all previous periods. The longer this continues, the more dramatic the effect.

A simple example: NOK 100,000 invested at 10% per year grows as follows:

The same NOK 100,000 that doubles in 10 years becomes 45x in 40 years — not 4x. The final decade (year 30 to 40) adds more NOK than the previous three decades combined. This is the power of compounding: returns accelerate as the base grows larger.

The Rule of 72

A quick mental calculation: divide 72 by your expected annual return to find how many years it takes to double your money. At 10%, your money doubles every 7.2 years. At 15%, every 4.8 years. At 20% — the kind of returns that disciplined cyclical investing can produce over a full cycle — every 3.6 years.

Compounding and Cyclical Investing

Cyclical investing, done well, can dramatically accelerate compounding because cycle returns are lumpy but large. A 500% gain over a 5-year cycle, followed by redeployment into the next cycle's trough, creates a compounding base that is 6x larger — and the next cycle's gains are 6x larger in absolute terms even if the percentage return is identical.

This is why the Aksjesparekonto matters so much for Norwegian cyclical investors: by deferring capital gains tax at each rotation, the full gain compounds into the next cycle. Tax drag — the erosion of compounding from paying capital gains at each step — is one of the largest reducers of long-term wealth accumulation.

The Reinvestment Decision

For companies that pay large variable dividends — shipping companies at cycle peaks, for example — the compounding decision is whether to reinvest dividends or withdraw them. Reinvesting dividends into the same stock at a cycle peak is often a mistake (you are buying expensive). The sophisticated approach is to receive the dividends and redeploy them into whatever sector is currently at its trough — turbocharging the cycle rotation strategy with actual cash flows.

Patience Is the Rarest Edge

The most consistent finding in long-term investment research is that individual investors dramatically underperform the funds they invest in — because they buy after performance and sell after drawdowns, effectively buying high and selling low in every cycle. Compounding requires not just good entry points but the patience to stay invested through the inevitable drawdowns.

Understanding cycle indicators reduces the emotional difficulty of staying invested: when you know that a shipping stock at 0.6x P/B with a depressed BDI has historically always recovered, the 30% drawdown between your entry and the eventual recovery becomes a data point rather than a catastrophe.