Business The Artprice100© index of Blue-chip artists up 3% over 2022 Vs S&P 500 -19% PRNW Agency Jan 18, 2023 PARIS, Jan. 18, 2023 /PRNewswire/ -- As a sales-based indicator, our Artprice100© index reflects a purely financial approach to art that in no way replaces the non-financial relationships between art collectors and artists. In essence, our…