Market Day Supply: The Weekly KPI That Separates Profitable Dealers From the Rest

Ask ten dealers how their stock is performing and you will hear ten different answers. Some will quote average days-to-sale, others gross margin, others units moved last month. All useful metrics, but each one looks backward. None of them tells you what the market is doing *right now* to the cars sitting on your forecourt. That is why a growing number of professional dealers across Europe have adopted a single weekly number as their north star: **Market Day Supply** (MDS). It is the closest thing the used-car industry has to a real-time demand-and-supply barometer, and once you start watching it, it is hard to go back. ## What Market Day Supply Actually Measures Market Day Supply answers one deceptively simple question: at the current rate of sale in your market, how many days would it take to sell every unit currently listed for a given vehicle? The formula is: > **MDS = (Number of active listings in the market) ÷ (Average daily sales in the market)** If there are 600 active listings of a 2022 Volkswagen Golf 1.5 TSI in Germany, and the market sells an average of 40 per day, MDS = 15 days. That is a *tight* market: demand is strong relative to supply, and dealers can hold price. If there are 1,200 listings of a 2021 BMW 3 Series 320d in France and only 20 sell per day, MDS = 60 days. That is a *loose* market: supply is piling up, and dealers who sit on their price will age out. The number is simple. The insight is not. MDS tells you **how long the market can absorb the car you just bought** — which is arguably the single most important piece of information in our business. ## Why Traditional Metrics Miss the Point Most dealers look at their own stock turn, which is perfectly reasonable. But your internal turn is a lagging indicator influenced by your photos, your price, your reviews, your location and your luck. It does not tell you whether you are selling fast *because the market is hot* or *because you underpriced*. MDS is a market-level metric. It strips out your dealership's individual quirks and shows you the raw demand landscape. Two dealers with identical stock can face very different MDS profiles depending on their catchment area, and a unit that is hot in Hamburg may be dead weight in Cologne. Three common mistakes MDS helps you avoid: - **Over-buying a "trending" model.** A car selling well last month does not mean MDS is still low today. Demand shifts weekly. - **Panic-discounting a slow unit.** If MDS for that segment has spiked industry-wide, a 3 % price cut will not fix it — you need a different strategy. - **Missing a quiet opportunity.** Some cars with low social-media buzz have surprisingly tight MDS in specific markets. That is where margin hides. ## How to Calculate MDS Without Losing a Day to Spreadsheets In theory, you could build MDS yourself by scraping listings, logging daily changes and estimating sales. In practice, that takes an analyst and several hours a week — which is why aggregated platforms now do the heavy lifting. Carindex, for example, tracks millions of active listings across 20+ countries and publishes rolling MDS figures by make, model, trim, fuel type, year and region. A dealer in Lyon can see in a few clicks that the MDS for a 2023 Peugeot 3008 Hybrid in France is 22 days, while the same car in Spain shows 48 days — a powerful hint about where to source, where to sell, and how aggressively to price. If you prefer to build the calculation in-house, here is the minimum viable version: 1. Pull the number of currently active listings for your target vehicle on the three or four biggest marketplaces in your country. 2. Count how many of those listings disappear in seven days (use a simple crawl or a paid data feed). 3. Divide weekly disappearances by seven to get daily velocity. 4. Divide active listings by daily velocity to get MDS. It is a rough estimate, but even a rough MDS is better than none. ## The Four MDS Zones Every Dealer Should Memorize Across hundreds of market snapshots, four repeatable MDS bands emerge for mainstream used cars in Europe: **Under 30 days — Hot market.** You can list at or slightly above market median and expect to sell inside a month. This is the zone to lean into for sourcing: margins are protected by demand. **30 to 60 days — Balanced market.** Standard pricing discipline applies. You will need good photos, a sharp description and a competitive price, but nothing exotic. **60 to 90 days — Soft market.** Reduce your bid price at auction by 2 to 4 %. If you already own the unit, price it just below the top quartile of listings immediately, not after 45 days of ageing. **Over 90 days — Saturated market.** Avoid adding stock unless you have a specific buyer lined up. If you are already long on the unit, consider wholesaling or cross-border export rather than riding the price down in your home market. These bands shift by segment. Luxury and sports cars naturally run higher MDS; hot hatches and compact SUVs run lower. Track your own benchmarks by segment over time — the relative movement matters more than the absolute number. ## A Monday Morning Routine That Pays for Itself Here is the five-step routine that several Carindex dealers across France, Sweden and Italy now run at the start of every week. It takes about twenty minutes. 1. **Pull the MDS report for every car currently on your lot.** Flag anything above 60 days. 2. **Re-price the flagged units before 10 a.m.** Monday is by far the highest-traffic day for used-car listings in most European markets. A fresh price on Monday morning is worth a 20 % lift in views versus the same price set on Thursday. 3. **Cross-check your three top-selling models.** If MDS is trending down week over week, increase your target stock for that model. If it is trending up, pause buying until it stabilises. 4. **Scan neighbouring markets.** Many successful dealers now run a secondary MDS report for the country next door. A unit with 70-day MDS at home and 25-day MDS across the border is a clear export candidate. 5. **Log the numbers.** Even a simple spreadsheet of weekly MDS by model gives you a powerful six-month trend line that no competitor is building. Dealers who stick with this routine for twelve weeks typically report a 10 to 18 % reduction in average days-to-sale, a 1 to 3 point improvement in gross margin, and — just as important — a calmer, more predictable cash flow. ## Where MDS Fits Alongside Your Other KPIs MDS does not replace your existing dashboard. It joins it. Think of it as the *forward-looking* counterweight to your backward-looking metrics. - **Days-to-sale** tells you how your store performed. - **Gross per retail unit** tells you how much margin you captured. - **Stock turn** tells you how hard your capital is working. - **MDS** tells you how hard the market is pulling *next week*. Used together, these four numbers give you a complete picture: what happened, why it happened, what you earned and what is coming. Dropping MDS out of the set is like sailing without checking the wind. ## Common Pitfalls to Avoid MDS is powerful, but it is not magic. A few traps worth flagging. **Do not confuse national MDS with local MDS.** A saturated national market can still have tight regional pockets. If you operate within a 150 km catchment, weight your MDS reading toward regional data when available. **Do not over-react to one week of movement.** MDS is volatile by nature — a bank holiday, a viral social post or a competitor firesale can move it 10 % in a week. Trust the trend, not the tick. **Do not ignore trim and options.** MDS for "a 2022 BMW 3 Series" is almost useless. MDS for "a 2022 BMW 320d xDrive Touring M-Sport with leather" is actionable. The more precisely you filter, the more valuable the number. **Do not stop at supply.** Always cross-check MDS with the median asking price and the 10th-percentile price. If supply is tight but prices are collapsing, something structural is shifting — and MDS alone will not warn you. ## Actionable Takeaways Market Day Supply is the closest thing our industry has to a live weather map. It will not guarantee profitable decisions, but it will sharply improve the odds of every sourcing, pricing and re-pricing call you make. Start this week. Pick five of your highest-volume models, calculate or look up their MDS, and commit to a Monday morning review for the next three months. Log the numbers. Watch the trends. Do that, and you will stop reacting to yesterday's sales and start positioning for next week's demand — which, in a used-car market moving faster every year, is exactly where profitable dealers need to be.