What Is Exposure-adjusted CAGR?

Exposure-adjusted CAGR is the Compound Annual Growth Rate (CAGR) normalised by the fraction of time a trading strategy actually holds positions in the market. It is calculated as CAGR / Exposure, where exposure (also called time in market) is expressed as a decimal between 0 and 1. A strategy that achieves a 15% CAGR but is only invested 50% of the time has an exposure-adjusted CAGR of 30%, reflecting its true capital efficiency. Without this adjustment, a low-exposure strategy can appear deceptively attractive — or deceptively boring — relative to a fully invested benchmark.

The metric matters because idle cash is not free. A strategy that is only 27% invested might show a modest 8% CAGR and low drawdown, but its exposure-adjusted CAGR of ~30% reveals that the alpha signal is actually powerful when active. Conversely, it also reveals the opportunity cost: that 73% of the time, capital sits uninvested and could be deployed elsewhere (in a risk-free asset, a second uncorrelated strategy, or even yield farming on stablecoins). Exposure-adjusted CAGR helps allocators decide whether to run a low-exposure strategy standalone or to stack it with complementary strategies that fill the idle periods.

In backtest evaluation, exposure-adjusted CAGR is essential for fair comparison. Ranking strategies purely by raw CAGR conflates signal quality with exposure level. A trend-following system that sits in cash during sideways markets will always show a lower raw CAGR than a buy-and-hold benchmark, even if its per-exposure returns are far superior. By normalising for time in market, the metric creates a level playing field. It pairs naturally with turnover analysis — high exposure-adjusted CAGR combined with low turnover and low cost drag is the hallmark of an efficient, implementable strategy.

Formula

Exposure-Adjusted CAGR = CAGR / Exposure

where Exposure = fraction of periods with open positions (0 to 1)

Pros

  • Reveals true capital efficiency by normalising returns for time in market

  • Enables fair comparison between strategies with different exposure levels

  • Highlights hidden alpha in low-exposure strategies that look modest on raw CAGR

  • Quantifies opportunity cost of idle capital

Cons

  • Assumes uninvested capital earns zero, which may not reflect reality (cash can earn risk-free rate)

  • Can inflate apparent quality of strategies that trade very rarely — a single lucky trade at 1% exposure produces a huge adjusted CAGR

  • Does not account for the practical difficulty of deploying idle capital elsewhere

  • Should always be reported alongside raw CAGR and exposure level, never in isolation

See also