A magnetic toner contains, as a magnetic powder, magnetic iron oxide having an octahedral particle shape and an average particle diameter of 0. This storage battery comprises a plurality of monoblock containers united to each other with space provided between the adjacent monoblock containers and one common cover to seal the openings of those monoblock containers. If the request is for visualizing information related to securities in one or more fixed income capital markets, visual representations are constructed using color codes and real value ratings converted from corresponding ratings issued from different sources and presented to the user.