Tag: Algorithm

France dominates latest Value Picks

Like Buzz Brands, which we explored last week, Value Picks are one of the four Wine Lister indicators, designed to highlight particularly interesting wines for our subscribers by isolating sub-sets of data. The Value Pick indicator helpfully identifies the wines and vintages which have the best quality to price ratio (with a proprietary weighting giving more importance to quality, thus allowing the finest wines a look-in).

This month, five of our eight new Value Picks are from France – but with a Sauternes, Riesling and left bank Bordeaux to choose from the options are still diverse.  Most affordable is Domaine Cauhapé La Canopée Sec 2011, from Jurançon, at just £16 per bottle and with a Quality score of 733.

The most expensive wine – but still at only £34 per bottle – is one of the two Italians that feature this month: Elio Grasso Barolo Ginestra Vigna Casa Maté 2004, which has an exceptional Quality score of 971. The other wine in the table with a Quality score above 900 is Domaine Zind-Humbrecht Clos Windsbuhl Pinot Gris 2007, from Alsace, priced at under £30 and with a Quality score of 906.

June Value Picks

Please see our previous Value Pick blog for a note on prices.

Recency weighting update to wine scores

We have updated our scoring algorithm to remove the impact of very old vintages on wine-level attributes and scores.  Our wine-level score is an overall score for a wine computed from both wine attributes such as search frequency for a cru (regardless of vintage), and its individual vintage data, e.g. critic ratings or price performance.

For data that exists by vintage, the equivalent wine-level attribute is calculated by taking an average across vintages, which is then used to compute a score at wine level.

Prior to the update, data from all vintages of a wine would be incorporated into the wine level average and, although vintages were weighted such that more recent vintages had a greater influence (recency weighting), we still found that very old vintages were disproportionately impacting our results.

Château d’Yquem serves as an extreme illustration of this phenomenon:



Prior to the update, Château d’Yquem’s average price (incorporating all vintages) was £712 per bottle, which was heavily skewed by very old vintages with very high prices. These vintages are rarely traded or tasted, and as such should not influence the wine-level average and corresponding wine scores.

As of today, we have updated our recency weighting across all criteria to exclude vintages over 30 years old from the wine-level average. Following the update, our average price for Château d’Yquem is £170 per bottle – a considerable reduction, and a much fairer representation of actual trade price expectations.