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‘Year-over-year’ is an accounting and finance term which refers to a comparison with the same time period in a previous year. Businesses will use year-over-year in order to predict trends and fluctuations in business activity and trade, as a means by which they can hope to predict the current year’s trends. Year-over-year can be a useful means of establishing budgets, or ensuring stock and employees are available, or indeed as a basis for making adjustments to a business’s operations to reflect predicted trends.