Allen, FRM, is evaluating the property of monthly stock return data using a sample with a sample size of 359. The summarized statistics are listed below:

| Statistics | Monthly Return |

|------------|----------------|

| Mean | 0.866% |

| Standard Deviation | 5.287% |

| $\sum_{t=1}^{359}(r_t - \bar{r})^3$ | -0.0236 |

| $\sum_{t=1}^{359}(r_t - \bar{r})^4$ | 0.0026 |

| $n$ | 359 |

What is the sample kurtosis?