Testador de Eficiência de Mercado

The Efficient Market Hypothesis says you can't predict tomorrow's price from today's information - returns should look random. We test this with three classic statistical tests: autocorrelation (do returns predict the next return?), runs test (are streaks of up/down days too long or too short?), and Lo-MacKinlay variance ratio (does volatility scale linearly with horizon?).

Todo Lab é baseado na matemática padrão de livros didáticos (Bodie / Kane / Marcus, Fabozzi, Tandelilin). Read the full methodology in the How It Works panel above.