Concerns around conflicts of interest have been expressed as well as the potential for an accumulation of systemic risk as the market is effectively dominated by four companies ("the Big Four"), namely Deloitte, Ernst Young, KPMG and PricewaterhouseCoopers.
Avaldatud on muret huvide konflikti ja süsteemse riski võimaliku akumuleerumise üle, kuna turul valitsevad neli ettevõtet (nn „suur nelik”): Deloitte, Ernst Young, KPMG ja PricewaterhouseCoopers.