There is a logical explanation for the phenomenon: Many buying residences as investments and intending eventually to sell for a profit end up renting out those flats in the interim to help cover their interest payments. When these investors grow in number, it creates both greater demand in the market for purchasing homes (pushing real estate prices higher) and greater supply in the market for renting homes (pushing rents lower).
此一現象背後的邏輯是：出於投資理由而購屋者，常會在轉手賣出、賺取差價之前將房屋出租，拿租金支付貸款利息；當這類投資者大量增加時，一方面會在購屋市場上造成超額需求而推升房價，一方面則在租屋市場上造成超額供給而壓低房租。