The blue line in the graph on the portfolio page represents the indicative market value of your portfolio and is a sum of the individual items in your portfolio. The market value indication is based on the market price indicator for bottles and bottles in cask (virtual bottles), a weighted, composite price of transactions on THE SWEX, SWI investment management agreement transactions and auction and retail prices from Whiskystats.com. This line builds up the amount to the present day and allows you to track your initial investment.