I'm one of those HN readers who has no idea. All I knew about "pro rata" was from tire warranties! http://continentaltire.custhelp.com/app/answers/detail/a_id/

I'm one of those HN readers who has no idea. All I knew about "pro rata" was from tire warranties! http://continentaltire.custhelp.com/app/answers/detail/a_id/789/~/mileage-warranty http://continentaltire.custhelp.com/app/answers/detail/a_id/... robotresearcher linked to an investment-related definition in another comment: https://corporatefinanceinstitute.com/resources/knowledge/finance/pro-rata-right/ https://corporatefinanceinstitute.com/resources/knowledge/fi...