This report describes the effects large-scale wind investments have on the Swedish and Nordic power market. The results presented in this report were obtained using Econ Pöyry’s BID model, a power market simulation tool with hourly time resolution, startup and part-load efficiency modelling, and advanced hydro modelling. We find that large scale wind power investments in Sweden and Norway would considerably reduce power prices in the Nordic area. At the same time, price volatility can be expected to rise slightly, in particular in hours of very high load (e.g. very cold winter months). In addition, hours of zero or very low prices may also become a reality in Sweden (as it can already be seen in Denmark today). The report is one of three final reports presented by the project Requirements of increased customer flexibility and large volumes of wind power.