The paper examined the performance of securitised property and analysed its diversification benefits when added into domestic mixed-asset portfolios constructed using Naïve and MPT optimization techniques. The paper also tested the hypothesis that the performance of naïve portfolios with securitised properties is better than naïve portfolios without securitised property. Design/methods: The data comprised quarterly returns of securitised property, all share, Federal bonds, State bonds, Debentures and Treasury bills for years 2000 to 2013. Return-risk analysis was compared using mean return, standard deviation, Sharpe ratio and correlation coefficient. Preliminary analysis was conducted on the data sets to examine the stationarity using the Philip Perron unit root test. In assessing securitised property return enhancements and risk reduction benefits in mixed-asset portfolio, 24 naïve portfolios (18 with securitised property and 6 without securitised property) were constructed and the effectiveness of diversification was assessed for each portfolio. This is in addition to examining the impact of securitised property on optimal portfolios using Markowitz quadratic function. Findings: The results showed that securitised property did not offer superior returns and underperformed most other assets on risk adjusted basis. While the results of the naïve portfolio showed no statistically significant difference in portfolio performance when securitised property was included; the effect was however dependent on the percentage weightings of assets and the asset class being replaced. The MPT analysis showed that along the efficient frontier, securitised property has no percentage allocation in the mixed-asset portfolio. Practi al Implication The study has implications for investors interested in emerging markets like the Nigerian investment market. Originality: It is one of the few attempts within the context of Africa's emerging market and Nigeria in particular.