What is the fine-grained topic of the following text: Given the impact of the OSFI-mandated mortgage stress test and higher borrowing costs on affordability, it makes sense that the condo apartment and semi-detached market segments experienced relatively stronger rates of price growth in November, as market conditions in these segments remained tight or tightened respectively over the past year. Only return the topic.
Impact of mortgage stress test and borrowing costs on condo apartment and semi-detached market segments' price growth.