Animal spirits refers the state of confidence or pessimism held by consumers, businesses and investors. Regarding financial markets, they represent the emotions of confidence, hope, fear, and pessimism that can affect an investor’s financial decision making, which in turn can fuel or hamper economic growth.

If spirits are low, then confidence levels will be low, which will drive down a promising market—even if the market or economy fundamentals are strong.

Likewise, if spirits are high, confidence among participants in the economy will be high, and market prices will soar.

According to the theory behind animal spirits, the decisions of investors and business leaders are based on intuition and the behavior of their competitors or other investors rather than on fundamental analysis.

Famous British economist, John Maynard Keynes believed that in times of economic upheaval, irrational thoughts might influence people as they pursue their financial self-interests. In 1936, Keyne published, The General Theory of Employment, Interest, and Money, where he postulated that trying to estimate the future yield of various stocks, companies, or financial activities using general knowledge and available insight “amounts to little and sometimes to nothing.”

Keynes referred to these psychological factors that make investors jump into the equity market — in the face of deep uncertainty and volatility, as animal spirits. He thought, only a manic, driven, strong-willed person would put capital at risk in periods of high uncertainty and volatility.

When animal spirits are strong, investment is sufficient to maintain aggregate demand; when they lag, aggregate demand falls, and the economy lapses into depression.

It is assumed that the only way people can make investment decisions in an uncertain and extremely volatile environment is if animal spirits guide them.

Source: CARLA TARDI, Animal Spirits, Investopedia, Updated Apr 20, 2019