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This web page opticalacumen.blogspot.com states the following, "At the Intersection of Data Visualization and Investment Research." We saw that the webpage said " Thursday, April 30, 2015." It also said " Mapping Investment Portfolios and Indexes. Based on the tree map research of Ben Shneiderman. Martin Wattenberg introduced the Map of the Market tool. On the SmartMoney website back in the late 1990s. While the colors tell a performance story of sorts - are individual securities and sectors up or down? I realized that an index or portfolio map based on dedicated rows for each sector, ." The header had Optical Acumen as the highest ranking optimized keyword. It is followed by David Harrell, data visualization, and investment research which isn't as ranked as highly as Optical Acumen.