FT SeriesAutumn collecting 2018As the season’s auctions get under way, we look at the events, people and trends shaping the art marketBono, David Adjaye and Theaster Gates discuss their Red auctionThe contemporary art sale will support Aids programmes in sub-Saharan AfricaThe Price of Everything draws back the curtain on the art worldThe film explores why some artists succeed and others fail in this peculiar ecosystemOld art responds to new mediaPlus: Instagram makes sales at Tefaf; virtual reality in Lagos; Ropac to represent Judd Foundation in EuropeArtissima opens a new sound art sectionThe Turin art fair’s separate venue gives the works the space they needMartine Franck comes out of the shadows at Fondation Cartier-BressonThe photographer stood ‘in the shadow of a great tree’, her husband Henri Cartier-Bresson, but a Paris exhibition aims to change that