VATICAN CITY, Feb 10 (Reuters) - The Vatican bank has joined with Morningstar MORN.O to launch two new equity indexes for stocks in line with Catholic principles, the two entities said on Tuesday, in an unusual collaboration between the Vatican and the financial sector.

The bank, officially known as the Institute for the Works of Religion $(IOR)$, said the indexes would each include 50 medium- and large-cap companies consistent with Catholic teachings on life issues, social responsibility and environmental protection.

The new equities are Morningstar IOR US Catholic Principles and Morningstar IOR Eurozone Catholic Principles.

Top holdings in the euro zone fund, according to Morningstar, include semiconductor supplier ASML Holding, Deutsche Telekom and software company SAP.

Socially responsible investing has grown in recent decades. Ave Maria Mutual Funds, a U.S. fund family that makes investments according to Catholic principles, said it had $3.8 billion in assets under management in 2025.

The joint venture between Morningstar and the Vatican bank follows efforts to clean up the reputation of the bank, which was tarnished in past decades by cases of corruption, embezzlement, and other crimes.

The late Pope Francis, who died last year, enacted a series of reforms to address those issues.

(Reporting by Joshua McElwee, editing by Alvise Armellini)

((joshua.mcelwee@thomsonreuters.com;))