10y

10y is a compact notation used to denote a time span of ten years. The lowercase 'y' stands for year in many contexts, and '10y' appears in notes, tables, or shorthand where space is limited. Beyond indicating a decade, the meaning varies by field: in mathematics, 10y is commonly read as the product 10 times y (10y). In longitudinal studies and historical data, '10y' can label data collected over ten years.

In finance, '10Y' or '10-year' is a standard term for a debt instrument's maturity or its yield. The United States 10-year Treasury note is a widely cited benchmark for long-term interest rates; quotes such as '10Y yield' reflect market expectations for inflation and policy. Changes in the 10-year yield influence borrowing costs for mortgages, governments, and corporations, and they often move with economic news and central-bank expectations.

In other contexts, '10y' may appear as a shorthand in inventories, datasets, or labeling where a decade is relevant. The case and usage (10y vs 10Y) can vary by style guide, language, and discipline.

Overall, 10y most commonly signifies a decade, but its precise meaning depends on the surrounding context, particularly whether it refers to time, financial instruments, or a mathematical expression.