Tearsheets and Standard Diagnostic Panels

Two researchers each test a new signal and each brings their own set of charts to a review meeting — one shows cumulative return and a drawdown chart, the other shows a monthly return heatmap and a rolling Sharpe line. Comparing the two strategies means mentally translating between two different sets of diagnostics, and worse, whatever a researcher happened to leave out (a bad drawdown period, an unstable rolling Sharpe) is invisible unless someone thinks to ask for it specifically. A tearsheet fixes this by making the set of charts and numbers a fixed, standard panel — every strategy, tested by anyone on the team, gets evaluated against the exact same layout.

What a standard panel typically contains

A tearsheet usually includes: cumulative return on a log scale (so a doubling early and a doubling late look the same size), a drawdown chart showing the depth and length of every losing period, a rolling window of the Sharpe ratio (to see if performance is stable or was carried by one lucky stretch), a table of summary statistics (annualized return, volatility, Sharpe, max drawdown, turnover), and often a monthly or yearly return breakdown to spot whether performance concentrates in a few periods. Because every strategy gets the same panel, a reviewer flips between two tearsheets and compares like for like immediately, rather than hunting for whether each researcher happened to check the same things.

The standard panel also works as a checklist against selective reporting: if the rolling Sharpe chart is always included, a researcher can't quietly leave it out because it happens to show an unflattering stretch of instability. The fixed format is doing double duty — making comparison easy, and making it harder to accidentally or deliberately present only the flattering slice of a result.

Worked example: reading two tearsheets side by side

Strategy A's tearsheet shows a smooth cumulative return line, but its drawdown chart reveals one 18-month stretch underwater that the cumulative return line, by itself, made look like ordinary noise. Strategy B's tearsheet shows a choppier cumulative line but a drawdown chart with no drawdown longer than three months. A reviewer looking only at cumulative return might prefer A; looking at the full standard panel, most reviewers would flag A's long drawdown as the more concerning risk characteristic, even with a similar overall return — exactly the kind of judgment call a partial set of charts would have hidden.

What this means in practice

Tearsheets earn their keep in review meetings and in comparing many candidate strategies quickly — a PM scanning ten tearsheets in the same layout can triage far faster than reading ten differently structured write-ups. The standard panel is not, by itself, a decision rule; two tearsheets that look similar can still differ in ways that matter (how much of the return came from a handful of trades, whether the backtest used point-in-time data), so a tearsheet is a starting point for a conversation, not a substitute for reading the accompanying report.