From 2006 to 2009, growth of bank deposits dropped by over 12 percentage points globally. The most affected by the 2008 global crisis were upper middle income countries that experienced a drop of 15 percentage points on average. Individual countries such as Azerbaijan, Botswana, Iceland, and Montenegro switched from deposit growth of 58 percent, 31 percent, 57 percent, and 94 percent in 2007 to deposit declines (or a complete stop in deposit growth) of -2 percent, 1 percent, -1 percent, -8 percent in 2009, respectively.
In times of financial stress, depositors get anxious, can run on banks, and withdraw their deposits (Diamond and Dybvig, 1983). Large depositors are usually the first ones to run (Huang and Ratnovski, 2011). By the law of large numbers, correlated deposit withdrawals could be mitigated if bank deposits are more diversified. Greater diversification of deposits could be achieved by enabling a broader access to and use of bank deposits, i.e. involving a greater share of adult population in the use of bank deposits (financial inclusion). Based on this assumption, broader financial inclusion in bank deposits could significantly improve resilience of banking sector funding and thus overall financial stability (Cull et al., 2012).