We take the scores from France's leading wine critic duo, map them into a single space to adjust for differences between our other partner critics' rating tendencies, and rebase them to use the full Wine Lister 1000-point scale. Each critic is weighted equally.

NB. This wine-level score is the average of all the vintages in our database, with a higher weighting for the most recent vintage, and gradually decreasing impact on the average for older vintages.

We take the scores from leading US wine critic, map them into a single space to adjust for differences between our other partner critics' rating tendencies, and rebase them to use the full Wine Lister 1000-point scale. Each critic is weighted equally.

NB. This wine-level score is the average of all the vintages in our database, with a higher weighting for the most recent vintage, and gradually decreasing impact on the average for older vintages.

We take the scores from the UK's leading wine critic, map them into a single space to adjust for differences between our other partner critics' rating tendencies, and rebase them to use the full Wine Lister 1000-point scale. Each critic is weighted equally.

NB. This wine-level score is the average of all the vintages in our database, with a higher weighting for the most recent vintage, and gradually decreasing impact on the average for older vintages.

A long wine life indicates a great wine, so we use longevity in our quality assessment, applying a modest weighting. We take the average length of our partner critics' suggested drinking windows, using the earliest start date given, and the drinking window close of each critic's most recent tasting note, updated as they retaste and reevaluate.

NB. This wine-level score is the average wine life of all the vintages in our database, with a higher weighting for the most recent vintage, and gradually decreasing impact on the average for older vintages.

We have scoured the world's top wine lists from Michelin-starred restaurants, 50 Best Restaurants, and World of Fine Wine Best Wine List restaurants, in order to ascertain global brand presence. Our algorithm takes into account the breadth of distribution in different restaurants, as well as the depth of presence within each list, in terms of number of vintages and bottle formats available, and comprises an estimator where we haven't yet found the wine on any restaurant wine list we have checked.

NB. This criterion is measured at wine level, as is the brand category rating.

Measuring the number of searches on the world’s most visited wine site, Wine-Searcher, provides a unique insight into a wine's overall popularity. We look at 3 month rolling average searches to smooth out any monthly spikes, while taking new trends into account.

NB. This criterion is measured at wine level, as is the brand category rating.

We use prices from Wine Owners, based on the world's largest price database, carefully calculated to remove anomalous and outlying listings, designed to represent a realistic market price. Updated weekly, we look at the average price for one 75cl bottle (or equivalent) excluding sales tax, to give an indication of what the market is willing to pay for each wine.

NB. This wine-level price is the average price of all vintages in our database, with a higher weighting for the most recent vintage, and gradually decreasing impact on the average for older vintages. This may differ from the price shown above as it is the average price over three months, as opposed to the current price.

NB. This may differ from the price shown above as it is the average price over three months, as opposed to the current price.

Using historical prices provided by Wine Owners, based on the world's largest price database, we calculate the price change over the last six months, and compare this to the average of the Wine Lister basket, in order to ascertain the relative short term price performance of each wine, giving an indication of its current price trend.

Using historical prices provided by Wine Owners, based on the world's largest price database, this is the the CAGR (compound annual growth rate) over the last three years, using rolling average three-month start and end prices, in order to ascertain the long term price performance of each wine, demonstrating whether its price has been sustainable over time.

We use historical prices provided by Wine Owners to calculate the price volatility, by looking at the standard deviation of the wine price over the last 12 months, expressed as a proportion of the average price over the same period. Low volatility equates to higher price stability, meaning less risk and therefore a better score.

Using figures collated by Wine Market Journal from sales at the world's major auction houses, we look at the total number of bottles sold of the top five vintages traded for each wine over the past four quarters, in order to measure the wine's relative trading volume.

NB. This measure is currently applied at wine level; vintage-level data coming soon.