Financial economics is the branch of economics characterized by a "concentration on monetary activities", in which "money of one type or another is likely to appear on both sides of a trade". Its concern is thus the interrelation of financial variables, such as prices, interest rates and shares, as opposed to those concerning the real economy. It has two main areas of focus: asset pricing (or "investment theory") and corporate finance; the first being the perspective of providers of capital, i.e. investors, and the second of users of capital.
The field of economics is not exempt from the consequences of chaos and complexity. Marketplaces are indeterminate; value is subjective; and outcomes are subject to interpretation. Economic forecasting is just as nebulous, being based on the probability of statistical information that may or may not be accurate.
L.K. Samuels, In Defense of Chaos: The Chaology of Politics, Economics and Human Action, Cobden Press (2013) p. 16.