Methodology

How observations become market signals, where contributors fit, and what the numbers do—and do not—mean.

What MarketSignalIndex measures

MarketSignalIndex currently measures observed seller asking prices for secondary enterprise hardware. An observation is a price associated with a specific part, seller or source, and point in time.

Observations can come from public seller listings, reseller catalogs, secondary marketplaces, or data supplied directly by contributors. Contributor-supplied data is only treated as contributor data after it has actually been received and processed; having a public contributor profile does not imply that every price shown on MSI came from that company.

These are asking prices, not confirmed transaction prices unless an observation is explicitly labeled otherwise. MSI does not currently blend completed-sale data into asking-price signals.

A community-driven data model

MSI is moving toward a community-driven model in which brokers, resellers, suppliers, recyclers, and other market participants can contribute the files and feeds they already use. Early contributor ingestion is intentionally manual while we learn the formats and fields that are actually useful.

Public sources remain useful for coverage and comparison. Contributor sources add direct market participation and context. We do not automatically assign a higher statistical weight simply because an observation came from a contributor; signal calculations should reflect the actual samples available.

See the Contributor directory for participating companies and the Data Sources page for source distinctions.

Freshness

Market pages display a Data as of date derived from the observations available for that market. Always check that date before using MSI to benchmark a live quote.

Different sources may refresh on different schedules. Contributor data is processed according to the cadence actually supplied by each contributor; public observations are refreshed according to MSI's collection schedule. Older observations can be excluded from current signal calculations when they no longer represent the active market.

Signal definitions

Signals are computed from the observed samples available for a canonical market class.

Median asking price

The median of eligible observed asking prices. It is less sensitive to a single unusually high or low listing than an average, but it still reflects the mix and quality of the available observations.

Observed asking-price range

The low-to-high range across eligible observations. A wide range can reflect condition differences, seller strategy, thin coverage, or genuinely fragmented pricing. It should not automatically be read as market volatility.

OEM premium

The percentage difference between the median observed asking price for OEM-certified parts and the median for Original manufacturer parts in the same market class. A positive value means OEM asking prices are higher in the observed sample. Formula: (OEM median − Original median) / Original median × 100

Compatible discount

The percentage by which the median Compatible asking price is below the median Original asking price. Formula: (Original median − Compatible median) / Original median × 100

Spread

The difference between the highest and lowest eligible asks relative to the midpoint. Wide spreads often indicate mixed conditions or quality tiers and should be interpreted alongside the underlying listings.

Liquidity score

A qualitative indicator derived primarily from observed sample depth. More independent, current samples generally provide a stronger view of the visible market than one or two observations.

Certification tiers

Where the underlying SKU data supports it, MSI separates OEM-certified, Original manufacturer, and Compatible parts so unlike products are not casually blended into one price comparison.

OEM — server-vendor branded or certified parts such as Dell, HPE, or Lenovo.
Original — component-manufacturer parts such as Samsung, Micron, Hynix, Intel, Seagate, or WD.
Compatible — third-party parts intended to meet the relevant specification.

Limitations

Asking prices, not confirmed transactions. The visible market can differ from where deals actually close.
Coverage is incomplete. Quote-only sellers, private broker activity, and unsubmitted inventory may not be represented.
Condition can vary. New, refurbished, and pulled hardware can produce very different asks for the same part number.
Contributor coverage is early. The contributor network and direct-feed history are still being built.
Freshness matters. Hardware markets can move faster than a given source refreshes.

How to use MSI

Use the signals as a reference point: compare a quote with observed asks, inspect sample depth and freshness, and then apply your own judgment about condition, warranty, seller reputation, quantity, and urgency. MSI is designed to improve market visibility, not replace due diligence.