Andy Warhol was the top-selling artist at auction last year as increased competition for the most-expensive segment of the market drove global art sales higher.
Collectors bought 1295 works by the artist totalling US$653.2 million, ahead of sales for Pablo Picasso and Francis Bacon, according to preliminary figures by New York researcher Artnet. Auctions worldwide rose 10 per cent to US$16 billion.
Art sales have more than doubled from US$6.3 billion in 2009, as surging financial markets lifted the fortunes of the world's richest. The top 400 billionaires added US$92 billion in wealth this year, for a net worth of US$4.1 trillion at December 29, according to the Bloomberg Billionaires Index.
Bidding for the most coveted artists has been driving much of the surge in auctions, according to Jeff Rabin, a principal at advisory firm Artvest Partners in New York.
"The headline number is not so much a comment on the art market as it is on global wealth," Rabin said. "We haven't seen a considerable increase in the number of objects sold. We have seen price appreciation at the top end."