%0 Journal Article %T A Black--Scholes Model with Long Memory %A John A. D. Appleby %A John A. Daniels %A Katja Krol %J Quantitative Finance %D 2012 %I arXiv %X This note develops a stochastic model of asset volatility. The volatility obeys a continuous-time autoregressive equation. Conditions under which the process is asymptotically stationary and possesses long memory are characterised. Connections with the class of ARCH($\infty$) processes are sketched. %U http://arxiv.org/abs/1202.5574v1