Forrester's market momentum overview assists vendor strategy professionals in tracking the evolution of the IT security market and in gathering intelligence about the major activities in that industry. In H1 2009, we tracked 178 different activities across four core categories of mergers and acquisitions (M&A), partnerships, new products, and changes in go-to-market strategies. Vendor activity remained relatively consistent with that in H2 2008, indicating that the market has begun to stabilize despite uncertainties in the broader economic environment. Vendors should use this data and analysis in benchmarking their own activity level to see if they should improve their positioning and marketing versus the competition.