Quantum spatial-periodic harmonic model for daily price-limited stock   markets
  We investigate the behavior of stocks in daily price-limited stock markets by purposing a quantum spatial-periodic harmonic model. The stock price is presumed to oscillate and damp in a quantum spatial-periodic harmonic oscillator potential well. Complicated non-linear relations including inter-band positive correlation and intra-band negative correlation between the volatility and the trading volume of stocks are derived by considering the energy band structure of the model. The validity of price limitation is then examined and abnormal phenomena of a price-limited stock market (Shanghai Stock Exchange) of China are studied by applying our quantum model. 
Xiangyi Meng, Jian-Wei Zhang, Jingjing Xu, Hong Guo
q-fin.GN physics.soc-ph