We examine the effects of opacity on bank valuation and synchronicity in bank equity returns over the years 2000–2006 prior to the 2007 financial crisis. As expected, investments in opaque assets are more profitable than investments in transparent assets, and taking profitability into account,...

Opacity fosters price contagion that exacerbates the speculative cycles of bubbles and crashes that create financial instability. We find that banks with larger investments in opaque assets benefitted more from intra-industry revaluations associated with announcements of mergers in the period...