Sterling Ratio¶

The Sterling ratio (SR) is a measure of the risk-adjusted return of an investment portfolio.

Version: v1 · 2026-09-28 · History
Domain-specific #: 12281
Domain group: Social Sciences
Origin domain: Economics & Finance
Subdomains: Portfolio Performance Measurement, Investment Management → Economics & Finance

Core Idea¶

Sterling Ratio is treated here as the recurring formal models and representations identity summarized by this source-grounded definition: The Sterling ratio (SR) is a measure of the risk-adjusted return of an investment portfolio.

The Sterling ratio (SR) is a measure of the risk-adjusted return of an investment portfolio. While multiple definitions of the Sterling ratio exist, it measures return over average drawdown, versus the more commonly used max drawdown. While the max drawdown looks back over the entire period and takes the worst point along that equity curve, a quick change of the look back allows one to see what the worst peak to valley loss was for each calendar year as well.

From there, the drawdowns of each year are averaged to come up with an average annual drawdown. The original definition was most likely suggested by Deane Sterling Jones (a company no longer in existence). SR=\frac{Compound ROR}{ABS(Avg.Annual DD -10\%)}.

For Sterling Ratio, the abstraction is narrower than the article's general subject matter: a positive case must preserve The Sterling ratio (SR) is a measure of the risk-adjusted return of an investment portfolio. Retaining only the name, a familiar example, or a downstream effect is insufficient. The specialist roles and tests remain anchored in formal models and representations, which is why this identity is domain-specific rather than prime.

Structural Signature¶

Sig role-phrases:

Defining carrier — The original definition was most likely suggested by Deane Sterling Jones (a company no longer in existence).
Constitutive relation — If the drawdown is put in as a negative number, then subtract the 10%, and then multiply the whole thing by a negative to result in a positive ratio.
Operating condition — While the max drawdown looks back over the entire period and takes the worst point along that equity curve, a quick change of the look back allows one to see what the worst peak to valley loss was for each calendar year as well.
Recognition evidence — The Sterling ratio (SR) is a measure of the risk-adjusted return of an investment portfolio.
Admissible variation — While multiple definitions of the Sterling ratio exist, it measures return over average drawdown, versus the more commonly used max drawdown.
Characteristic consequence — From there, the drawdowns of each year are averaged to come up with an average annual drawdown.
Failure boundary — If the drawdown is put in as a positive number, then add 10% and the result is the same positive ratio.

What It Is Not¶

Not the whole field of formal models and representations. The node requires the specific identity stated by The Sterling ratio (SR) is a measure of the risk-adjusted return of an investment portfolio.
Not an over-broad reading. Since bills did not experience drawdowns (and a ratio of 1.0 at that time), he felt that any investment with a ratio greater than 1.0 had a better risk/reward tradeoff.
Not an over-broad reading. The Sterling ratio (SR) is a measure of the risk-adjusted return of an investment portfolio.
Not an over-broad reading. While multiple definitions of the Sterling ratio exist, it measures return over average drawdown, versus the more commonly used max drawdown.
Not automatically Loss ratio. Retrieval proximity does not establish equivalence; the two identities must be compared by carrier, operation, and failure boundary.

Scope of Application¶

Sterling Ratio applies literally inside formal models and representations wherever the source-defined carrier and relation can be established. Its documented habitats include:

Documented setting. While multiple definitions of the Sterling ratio exist, it measures return over average drawdown, versus the more commonly used max drawdown.
Documented setting. To clarify the reason, he (Deane Sterling Jones) used 10% in the denominator was to compare any investment with a return stream to a risk-free investment (T-bills).
Documented setting. While the max drawdown looks back over the entire period and takes the worst point along that equity curve, a quick change of the look back allows one to see what the worst peak to valley loss was for each calendar year as well.
Documented setting. The Sterling ratio (SR) is a measure of the risk-adjusted return of an investment portfolio.
Documented setting. From there, the drawdowns of each year are averaged to come up with an average annual drawdown.
Documented setting. The original definition was most likely suggested by Deane Sterling Jones (a company no longer in existence).

Outside formal models and representations, the name should be retained only when these same operational conditions survive; otherwise the comparison belongs to the broader parent Measurement or should be marked as analogy.

Clarity¶

A clear use of Sterling Ratio names the carrier, the operative relation, and the conditions under which the source treats the identity as present. The minimal definition is The Sterling ratio (SR) is a measure of the risk-adjusted return of an investment portfolio. The strongest recognition evidence in the frozen account is: The Sterling ratio (SR) is a measure of the risk-adjusted return of an investment portfolio. A report should distinguish that evidence from a proxy, consequence, or common implementation. It should also state the qualification Since bills did not experience drawdowns (and a ratio of 1.0 at that time), he felt that any investment with a ratio greater than 1.0 had a better risk/reward tradeoff. so that a reader can reproduce the classification rather than infer it from topical resemblance.

Manages Complexity¶

Sterling Ratio compresses multiple formal models and representations details into a stable diagnostic relation. The source shows both the central mechanism—if the drawdown is put in as a negative number, then subtract the 10%, and then multiply the whole thing by a negative to result in a positive ratio.—and the practical consequence—from there, the drawdowns of each year are averaged to come up with an average annual drawdown. This compression makes cases comparable while leaving parameters, conventions, exceptions, and evidential quality explicit. It is lossy by design: local history and implementation details may be omitted only when they do not alter the defining relation.

Abstract Reasoning¶

Type the carrier. Identify the formal models and representations entities to which the claim applies.
State the relation. Use the source-grounded identity: The Sterling ratio (SR) is a measure of the risk-adjusted return of an investment portfolio.
Check operation and conditions. While the max drawdown looks back over the entire period and takes the worst point along that equity curve, a quick change of the look back allows one to see what the worst peak to valley loss was for each calendar year as well.
Demand recognition evidence. The Sterling ratio (SR) is a measure of the risk-adjusted return of an investment portfolio.
Test variation. Change an implementation or setting while preserving while multiple definitions of the Sterling ratio exist, it measures return over average drawdown, versus the more commonly used max drawdown.
Run the collapse test. Remove the defining operation; if the label still seems equally apt, only a topic or correlate was retained.
Reduce cautiously. When the specialist conditions cannot be carried, route the residual comparison to Measurement.

Knowledge Transfer¶

Within the home domain. Knowledge about Sterling Ratio transfers literally when a new case preserves the same carrier type, relation, and recognition test. While multiple definitions of the Sterling ratio exist, it measures return over average drawdown, versus the more commonly used max drawdown. To clarify the reason, he (Deane Sterling Jones) used 10% in the denominator was to compare any investment with a return stream to a risk-free investment (T-bills).

Beyond the home domain. No canonical parent is asserted for Sterling Ratio. An outside case receives the specialist name only when the same typed roles and rejection conditions can be filled literally; otherwise the comparison remains an analogy pending later graph densification.

Examples¶

Canonical¶

The Sterling ratio (SR) is a measure of the risk-adjusted return of an investment portfolio. This case is canonical because it supplies a concrete carrier and lets the defining relation be checked rather than merely named.

Mapped back: carrier → the entities in the documented case; operation → The Sterling ratio (SR) is a measure of the risk-adjusted return of an investment portfolio; recognition evidence → The Sterling ratio (SR) is a measure of the risk-adjusted return of an investment portfolio

Applied / In Practice¶

While multiple definitions of the Sterling ratio exist, it measures return over average drawdown, versus the more commonly used max drawdown. The applied case shows how the identity is used under a second setting or qualification while keeping the same operative relation.

Mapped back: changed setting → the applied context; invariant → The Sterling ratio (SR) is a measure of the risk-adjusted return of an investment portfolio; boundary → the case exits the class when since bills did not experience drawdowns (and a ratio of 1.0 at that time), he felt that any investment with a ratio greater than 1.0 had a better risk/reward tradeoff

Structural Tensions¶

T1 — Stable identity versus admissible variation. Since bills did not experience drawdowns (and a ratio of 1.0 at that time), he felt that any investment with a ratio greater than 1.0 had a better risk/reward tradeoff. The tension matters because emphasizing only one side either dissolves the identity or overstates what the evidence and domain conventions warrant.

Diagnostic: Which changes preserve the defining relation, and which replace it?

T2 — Recognition versus proxy. The Sterling ratio (SR) is a measure of the risk-adjusted return of an investment portfolio. The tension matters because emphasizing only one side either dissolves the identity or overstates what the evidence and domain conventions warrant.

Diagnostic: Does the cited evidence establish the identity or only a correlated sign?

T3 — Definition versus implementation. While multiple definitions of the Sterling ratio exist, it measures return over average drawdown, versus the more commonly used max drawdown. The tension matters because emphasizing only one side either dissolves the identity or overstates what the evidence and domain conventions warrant.

Diagnostic: Is the observed implementation constitutive, optional, or merely common?

T4 — Scope versus overextension. From there, the drawdowns of each year are averaged to come up with an average annual drawdown. The tension matters because emphasizing only one side either dissolves the identity or overstates what the evidence and domain conventions warrant.

Diagnostic: Can every claimed application fill the same typed roles without metaphor?

T5 — Transfer versus domain accent. The original definition was most likely suggested by Deane Sterling Jones (a company no longer in existence). The tension matters because emphasizing only one side either dissolves the identity or overstates what the evidence and domain conventions warrant.

Diagnostic: Does the receiving case instantiate Sterling Ratio literally, co-instantiate Measurement, or only resemble it?

T6 — Autonomy versus reduction. If the drawdown is put in as a negative number, then subtract the 10%, and then multiply the whole thing by a negative to result in a positive ratio. The tension matters because emphasizing only one side either dissolves the identity or overstates what the evidence and domain conventions warrant.

Diagnostic: What does Sterling Ratio distinguish that the broader parent Measurement leaves together?

Structural–Framed Character¶

Sterling Ratio is mixed or framed-leaning. Its structural side is the repeatable organization summarized by The Sterling ratio (SR) is a measure of the risk-adjusted return of an investment portfolio. Its framed side is the formal models and representations vocabulary that fixes the carrier, evidence, exceptions, and admissible transformations.

Evaluative weight: the identity can be stated descriptively even when applications carry practical stakes. Human-practice dependence: the source-grounded carrier determines whether the relation exists independently or is constituted by a practice. Institutional origin: disciplinary conventions stabilize the name and test. Vocabulary portability: While the max drawdown looks back over the entire period and takes the worst point along that equity curve, a quick change of the look back allows one to see what the worst peak to valley loss was for each calendar year as well. Import versus recognition: literal transfer requires the same mechanism; shape alone is analogy.

Its portable skeleton is Measurement. Its character: a recurring specialist identity whose thin organization can be abstracted, while its operational meaning remains domain-bound.

Structural Core vs. Domain Accent¶

What is skeletal. The Sterling ratio (SR) is a measure of the risk-adjusted return of an investment portfolio. The stable skeleton is the typed relation expressed in that definition and the entry's recognition and collapse tests. The source identifies these operative conditions: The original definition was most likely suggested by Deane Sterling Jones (a company no longer in existence). If the drawdown is put in as a negative number, then subtract the 10%, and then multiply the whole thing by a negative to result in a positive ratio. It further constrains recognition and variation through: While the max drawdown looks back over the entire period and takes the worst point along that equity curve, a quick change of the look back allows one to see what the worst peak to valley loss was for each calendar year as well. The Sterling ratio (SR) is a measure of the risk-adjusted return of an investment portfolio.

What is domain-bound. formal models and representations supplies the operative entities, technical vocabulary, warrants, and exceptions that make Sterling Ratio literal. Its documented scope includes the condition that While multiple definitions of the Sterling ratio exist, it measures return over average drawdown, versus the more commonly used max drawdown. Another bounded application condition is that To clarify the reason, he (Deane Sterling Jones) used 10% in the denominator was to compare any investment with a return stream to a risk-free investment (T-bills). These are not decorative examples; they determine which carrier and evidence can fill the abstraction's roles.

Why no parent is asserted. Removing those specialist details does not currently yield one live catalog node that is a necessary genus for every instance. The entry is therefore approved as unparented rather than attached by topical resemblance. Its collapse evidence remains specific—While multiple definitions of the Sterling ratio exist, it measures return over average drawdown, versus the more commonly used max drawdown.—and future graph densification may discover a defensible relation only if it preserves that boundary.

This entry is a kind of Measurement.

Approved unparented node. No current live node supplies a defensible necessary genus or structural prerequisite for Sterling Ratio. The reviewed identity is: The Sterling ratio (SR) is a measure of the risk-adjusted return of an investment portfolio. The accelerated suggestion was declined because topical or lexical similarity does not establish hierarchy; the node is admitted without a parent pending later graph densification.
Related reasoning operations. Evidence, representation, comparison, classification, transformation, or evaluation may participate in particular cases, but participation does not make any one of them a necessary parent of every instance.

Relationships to Other Abstractions¶

Current abstraction Sterling Ratio Domain-specific

Parents (1) — more general patterns this builds on

Sterling Ratio is a kind of Measurement Prime

Sterling Ratio is a strict kind of Measurement: its frozen identity entails the parent's defining structure while adding domain-specific restrictions.

Hierarchy path (1) — routes to 1 parentless root

Sterling Ratio → Measurement

Neighborhood in Abstraction Space¶

Sterling Ratio sits in a moderately populated region (45^th percentile for distinctiveness): it has near-neighbors but no dense thicket of look-alikes.

Family — Financial Ratios & Instruments (20 abstractions)

Nearest neighbors

Put/Call Ratio — 0.90
Merton's portfolio problem — 0.87
Deleveraging — 0.87
Value at risk — 0.86
Loss ratio — 0.86

Computed from structural-signature embeddings · 2026-10-08

Not to Be Confused With¶

Measurement. The parent omits the specialist differentia. Tell: Can the case establish The Sterling ratio (SR) is a measure of the risk-adjusted return of an investment portfolio?
Loss ratio. Loss ratio denotes ratio of losses to gains in insurance accounting. Tell: Which entry's carrier, operation, and failure condition are satisfied?
Relative Strength Index. Relative Strength Index is a recurring identity in formal models and representations, social sciences, humanities, and arts defined by: Indicator in technical analysis. Tell: Which entry's carrier, operation, and failure condition are satisfied?
Upside Potential Ratio. Compare an investment's expected above-target return with its downside deviation below the same minimum acceptable return by dividing first upper partial moment by the square root of second lower partial moment. Tell: Which entry's carrier, operation, and failure condition are satisfied?
A measurement, proxy, or consequence. Those may provide evidence without being the identity. Tell: Would Sterling Ratio remain present if the detector or downstream effect changed?
A metaphorical analogue. A similar shape outside formal models and representations lacks the specialist mechanism. Tell: Do the native roles transfer literally, or only the parent Measurement?

References¶

Frozen Wikipedia discovery revision: https://en.wikipedia.org/wiki/Sterling_ratio (revision 1363667603).

The frozen Wikipedia revision is discovery provenance. The retained source set was reviewed for identity, formal or operational relation, and scope. The encyclopedia's structural synthesis is bounded to those claims; a thin authority surface is recorded as a nonblocking source-strengthening repair rather than concealed.