• Do insiders crowd out analysts?

      Gilbert, A; Tourani-Rad, A; Wisniewski, T (AUT Faculty of Business, 2004)
      Both insiders and analysts are involved in the collection and dissemination of information to the market, roles which impact heavily on price efficiency and resource allocation. The differences between the two groups, ...
    • Insider trading, regulation and the components of the Bid-Ask Spread

      Frijns, B; Gilbert, A; Tourani-Rad, A (AUT Faculty of Business, 2005)
      Insiders pose a risk to providers of liquidity, who require compensation for this and consequentially widen spreads. In this paper we investigate the relationship between insider trading regulation and the cost of trading ...
    • Insiders and the law: the impact of Regulatory Change on Insider Trading

      Gilbert, A; Tourani-Rad, A; Wisniewski, T (AUT Faculty of Business, 2004)
      The impact of regulations in minimizing the detrimental effects of insider trading is unsettled. In this paper, we investigate the impact of the introduction of the Securities Market Amendment Act 2002 in New Zealand on ...
    • The impact of regulations on the informational basis of insider trading

      Gilbert, A; Tourani-Rad, A (AUT Faculty of Business, 2006)
      While insider trading has been regulated in the vast majority of countries with financial markets, the efficacy of these regulations has only been sparsely examined. In this paper we examine the impact of major regulatory ...
    • The impact of Regulatory Change on Insider Trading Profitability: some early evidence from New Zealand

      Gilbert, A; Tourani-Rad, A; Wisniewski, T (AUT Faculty of Business, 2004)
      This paper adds to the scant literature on the tightening of regulations and its impact on the profitability of insider trades by examining the effects of the recent enactment of the Securities Market Amendment Act 2002 ...