An equity REIT owns and operates income-producing real estate, and its value is closely tied to property fundamentals such as rent levels, occupancy, operating costs, and the balance of supply and demand in the markets where it owns properties. Overbuilding increases supply of available real estate (e.g., more apartments, office space, retail capacity) relative to demand, which typically puts downward pressure on rents, increases vacancy risk, and reduces property-level cash flows. Lower expected cash flow and weaker pricing power generally reduce the value of the REIT’s properties and can lead to lower REIT share valuations. That is why A is correct.

Choice B is generally positive, not negative: low mortgage rates can support real estate values by reducing financing costs, increasing affordability, and improving the economics of acquisitions and development (though effects can vary). Choice C—increasing property values—is typically positive for equity REITs because it can raise the value of the underlying real estate portfolio and improve net asset value. Choice D—higher occupancy rates—is also generally positive because it means more leased space, steadier rental income, and improved cash flow stability.

This question is testing a fundamental real estate cycle concept often included in SIE product/risk discussions: real estate is sensitive to economic activity and supply/demand imbalances. Overbuilding is a classic negative driver because it can persistently compress revenues and margins until excess supply is absorbed. Equity REIT investors must consider these sector dynamics, alongside interest-rate sensitivity, leverage, and property-type exposure.