About Us

A carefully planned trajectory

The name Convexity means a rounded curve joining two points on a graph. Convexity also represents the elegant arc of a business relationship formed by bringing together the smart eye for long-term investment with the craft of an excellent winemaker and Napa premier vineyards. Thus, Convexity represents the best investment — making classic, premium quality Napa Valley Cabernet.

Steve Matthiasson


Four time James Beard Nominated and celebrated as The San Francisco Chronicle’s 2014 Winemaker of the Year, Steve Matthiasson brings to Convexity his expertise on vineyard management and winemaking. Matthiasson’s experience has placed him as a leader in sustainable vineyard development in Napa Valley. His quality winemaking has been celebrated by Food & Wine, The Wine Spectator, The San Francisco Chronicle and The Wall Street Journal, as well as being a main focus in the book The New California Wine by Jon Bonne. Matthiasson began making wine in Napa Valley in 2003.

In making Convexity, winemaker Steve Matthiasson expresses the unique character of Napa Cabernet. To showcase that quality, the Long-Term Wine Company team selects the best vineyard sites, and superior grapes from the Napa Valley. Convexity shows the result. The wine offers mouthwatering flavor from the warm sun of Napa brought together with the focused energy and flinty tension of outstanding Cabernet, a juicy, balanced wine with beautiful flavor.


The Team

Together John Meriwether, Chi-fu Huang and Eric Rosenfeld formed the LTWC. Earlier they were partners together in an asset management company, where they drew on mathematical models to make long horizon investments in equities, fixed income, and foreign currencies in the major global markets. LTWC continues this tradition of excellence in the more liquid markets.