Abstract: The present disclosure describes systems and methods for users to interact with one another by communicating through the user interface of their respective client devices. One aspect of this communication includes the ability for users to form a communication group with at least one other user. A communication group may be a computing group in which users within that group communicate various content items (e.g., images, text messages, current location, relative location, group invitations, directions request, third-party information, point of interest request etc.) with one another using their respective client devices to the exclusion of other users not included in that group.

Abstract: Contribution-based segmentation classification measures a contribution that an entity provided to a group dynamic. Contribution-based segmentation classification forms a network structure that represents relationships among a set of entities and produces a random partition of the set of entities into a fixed number of groups of entities. For each of a plurality of iterations, contribution-based segmentation classification sequentially associates each entity with each group, and measure a modularity for the network, adds the measured modularity to a vector of modularities for the respective entity using the groups as a base, and compute a distance between each of the entities using the modularity vectors to form clusters of vectors according to the computed distance, and segments the entities according the formed clusters.

Abstract: A dynamic trading investment product and techniques for administering such a product are described. The dynamic trading investment product holds at least one security and includes establishing a dynamic trading investment product account for an investor, receiving from an investor a budget parameter established by the investor for the security, monitoring by one or more computers the price of the security during secondary trading on a trading venue, determining by one or more computers according to the monitored price and target growths whether to issue orders to buy or sell the security; and when determined to issue orders, issuing orders to buy or orders to sell the according to the monitored price and target growths, and adding shares to or removing shares from the dynamic trading investment product of the investor according to whether the issued orders are orders to buy or sell the security.

Abstract: A computer implemented techniques for visualize performance of a particular security or a portfolio of securities based on the behavior of traders that trade in the particular security or portfolio of securities is described.

Abstract: At least one listing comprises a plurality of sublistings, each of the sublistings being associated with one of a plurality of advertisers. A response subsystem is configured to provide the listing in a response. A forwarding subsystem configured is to forward a request for information to one of the advertisers.