The phrase "equity classes" refers to different types or categories of ownership in a company. It describes the various groups or divisions of shares that people can own in a company, which can have different rights and privileges. Full definition
Those returns show the utility of investing in a diversified basket of equity classes. (hopetoprosper.com)
You don't need to allocate exactly one - third to each asset equity class in your portfolio: there's no optimal number here. (moneysense.ca)
I believe a critical part of changing the way we look at equities is by the recognition that there are wide differences in the safety profile of various equity classes. (fastgraphs.com)