what is the nvi
DEFINITION of 'Negative Volume Index - NVI' A technical indicator that relies on changes in a securityâs volume to identify when smart money is driving the current trend. The Negative Volume Index suggests that unsophisticated investors buy and sell primarily on high-volume days, while shrewd investors are more likely to trade on low-volume days. A technical indicator that relies on changes in a securityâs volume to identify when smart money is driving the current trend.