Stock analysts have commented that auction house Sotheby's "has an almost impenetrable moat against competition," according to Paul's column earlier this week ('These stocks may be 'set to pop' - but you can do better', November 2). thanks to ongoing strength in the collectors' markets.

The firm will no doubt be hoping to continue to prove itself in its upcoming sale of Latin American Art in New York on 16 and 17 November 2011. The auction will showcase a range of Latin American paintings and sculpture from the continents' most important artists.

These are set to include exceptional works from important collections that are fresh to the market.

A group of Rufino Tamayo paintings that span the course of the artist's career are among the highlights of the sale alongside exceptional works by Alfredo Ramos Martínez, Emiliano Di Cavalcanti, Wilfredo Lam, Matta, and a retrospective selection of works by Venezuelan Kinetic artist Jesús Rafael Soto.

La India Del Lago by Alfredo Ramos Martínez is a major highlight of the sale and one of the most important paintings by the artist to have appeared at auction for many years (estimated at $900,000/1.2 million).

During a decade-long stay in Paris at the beginning of the 20th century, Ramos Martinez established friendships with some of the most important artists of the Impressionist and Post-Impressionist movements.

La India Del Lago, 1938, comes from Alfredo Ramos Martínez's 'California period'

La India Del Lago from 1938 comes from the artist's California period and exemplifies his depictions of Mexican imagery. Also by Ramos Martínez are Vendedoras de Flores de Xochimilco (est. $200/300,000) and La Joven De Cuernacava (estimated at $200/300,000).

Rufino Tamayo is considered one of the most acclaimed artists of his generation one of the great colourists of the twentieth century. The sale includes eight works dating from 1928 to 1966 in a retrospective of his career that encompasses many of his signature themes and images.

The group is led by Watermelon Slices which is being sold by The Museum of Modern Art, New York to Benefit the Acquisitions Fund (estimated at $1.5/2 million).

Watermelon Slices fuses both the international modernist aesthetics of Cubism with a local subject matter and symbolism. The simple two-dimensionality, sparseness and geometric forms are an essential part of Tamayo's art from this period.

Watch this space for more news on Sotheby's sale.