|A financial physics themed cartoon by physicist and cartoonist Randall Munroe, used to mock the 2013 The Physics of Wall Street by James Weatherall. |
In 1863, French economist Jules Regnault (1834-1894) published his “Calculations of Chances and Philosophy of Trading”, said to have been strongly influenced by the social physics of Adolphe Quetelet, and in doing so developed a version of what has been called “financial physics”
In 1900 French mathematician Louis Bachelier, in his The Theory of Speculation, built on the work of Regnault, to use a random hypothesis to treat securities prices similar to gas molecules, moving independently of each other, with future movements being independent of past movements, hence starting the field of econophysics, according to some classifications.
In 2008, University of Houston initiated their "econophysics" department (see: American school of econophysics), under the leadership of American physicist Joseph McCauley, which in large part seems to be focused on applications of physics in finance.
In 2012, New Scientist, per citation to Bikas Chakrabarti, published following financial physics stylized info box: 
In 2013, James Weatherall, in his The Physics of Wall Street, supposedly, outlined some type of financial physics. 
● Financial thermodynamics
● Financial temperature
1. Weatherall, James O. (2013). The Physics of Wall Street: a Brief History of Predicting the Unpredictable. Houghton Mifflin Harcourt.
2. (a) Brown, Aaron. (2012). “The Physics of Wall Street: the Most Arrogant Book in the World?, Dec 17, MinyAnville.com.
(b) Weatherall, James O. (2013). The Physics of Wall Street: a Brief History of Predicting the Unpredictable. Houghton Mifflin Harcourt.
3. Ghosh, Asim. (2013). “Econophysics Research in India in the Last Two Decades” (pdf), ArXiv, Aug 26.