Mark Carney, in his role as vice-chair of the European Systemic Risk Board, has recently discussed ESRB contributions to maintaining financial stability. Points of interest include the following. (i) the ESRB is currently surveying market makers and asset managers as part of a broader study into the risks from a reduction in market liquidity, including whether open-ended funds have liquidity sufficient to meet redemptions in the event of market stress. Stress testing of the investment fund sector can be expected in the future, complementing existing stress tests of banks, insurers and pension funds; and (ii) the ESRB is also starting to access detailed derivative trade reports from trade repositories across the EU to better understand the complex webs of derivative transactions and how they could propagate and dampen risk across the system.