(Ed note: First published June 2016) The ASX 200 is down a massive 3.6% today following the Leave vote in the UK. Now is a good time to ask yourself: buy more, continue holding, or cut your losses and sell? Livewire reached out to a selection of fund managers to understand the process they follow if a stock in their portfolio suffers a significant fall. As discussed in some of our contributors’ responses, the decisions you make after a stock has dropped are essential to your long-term performance. While the processes followed vary significantly between managers, what stands out is that the processes are pre-defined and prepared well in advance. This demonstrates that investors need to be proactive rather than reactive. Click the link below to access the full responses from Peters Macgregor, Forager Funds, Morphic Asset Management, Ausbil, and Cadence Capital.