House Price-Rent ratio = House price Monthly Rent × 12 {\displaystyle {\mbox{House Price-Rent ratio}}={\frac {\mbox{House price}}{{\mbox{Monthly Rent}}\times 12}}} The latter is often measured using the "owner's equivalent rent" numbers published by the Bureau of Labor Statistics. It can be viewed as the real estate equivalent of stocks' price-earnings ratio; in other terms it measures how much the buyer is paying for each dollar of received rent income (or dollar saved from rent spending). Rents, just like corporate and personal incomes, are generally tied very closely to supply and demand fundamentals; one rarely sees an unsustainable "rent bubble" (or "income bubble" for that matter).[citation needed] Therefore a rapid increase of home prices combined with a flat renting market can signal the onset of a bubble.