IMPROVED · 4 OCTOBER 2026

Fair Value Discounts can use market data for cards and UK property

Set the widget to Market reference and collectible cards are compared with their 90-day average price, and UK property with what you paid carried forward by the local house price index.

Fair Value Discounts compares everything other than stocks with a fair value you type in yourself. For two asset classes there is now outside data to compare with instead. In the widget's cog menu, under "Compare other assets with", choose Market reference.

Neither is a fair value in the way a stock's discounted-cash-flow figure is. Each is what the holding is worth by a simple, stated rule, and every card in the widget says which rule it used, with an ⓘ that shows the sum.

Collectible cards: the 90-day average

Each card is compared with its average market price over the last 90 days, for the printing you own, times your copies. A card trading below its recent average shows as a discount. The prices are TCGplayer's, as recorded by TickerMint, and a card needs at least 30 days of them before it gets a reference.

UK property: the local house price index

Edit a property on the Portfolio page and add its postcode, its type and, if you like, what you paid and when. We find its area in HM Land Registry's UK House Price Index and carry the price forward to the latest month the index covers, using the index for your type of property where the area publishes one. Without a purchase price it starts from the value you entered. The widget then sets that against the value you've entered, before the mortgage.

Your postcode isn't kept

The postcode is sent once to postcodes.io, a free public lookup, to find the council area. Only the area's name is saved on the property. The privacy policy says so.

What it can't tell you

A local index is an average for the area, not a valuation of your home. It's published about two months behind, and Scotland's starts in 2004 and Northern Ireland's in 2005. Crypto, precious metals, pensions, bonds and other assets have no market reference, so with Market reference they show No Data. Switch back to Your estimate for those.

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