I remember being asked after I had completed a valuation of Tata Motors a few years ago whether I would buy its stock and shocking my audience by saying that I would never buy a Tata company for my portfolio.
When pushed for my rationale, I said that buying a family group company is like getting married and having your entire set of in-laws move into the bedroom with you;
in investment terms, if I invest in Tata Motors, I will (unwillingly) also be investing in many other Tata Group companies, because about 30-40% of the value of Tata Motors comes from its holdings in other Tata companies.
–wrote Aswath Damodaran,Professor of Finance,New York University
