When did MCO join the S&P 500?

Moody's Corporation joined the S&P 500 index on 1998-07-01.

What sector is MCO in?

MCO is in the Financials sector, Financial Exchanges & Data industry.

MCO — Moody's Corporation

Financial Exchanges & Data · Financials

Key Facts

Status	Active
Sector	Financials
Industry	Financial Exchanges & Data
Joined	1998-07-01
Tenure	28 yrs

Moody's Corporation provides credit ratings, research, tools, and analysis for the global capital markets. The company operates through two segments: Moody's Investors Service (MIS) and Moody's Analytics (MA). MIS is a credit rating agency that publishes credit ratings on debt and entities, including various corporate and government debt, structured finance securities, and commercial paper programs. The MA segment develops products and services to support financial analysis and risk management activities for participants in the global financial markets.

Industry Peers

CBOE CME COIN FDS ICE MSCI NDAQ SPGI

Sector Peers

ACGL AFL AIG AIZ AJG ALL AMP AON APO ARES

S&P 500 Timeline

1998-07-01Joined S&P 500

Data source: Wikipedia · CC BY-SA 4.0 · Updated 2026-07-10