I decided to test an idea of Parasoja’s since I wasn’t planning to login much over the Christmas break, what with holidays and work taking up a lot of time.
01 December 2012: bought 2860M of capital and/or capital component blueprints
01 Feb 2013: sold them for 3840M
Profit: 980M (40M/week/research slot)
Not bad for the low amount of effort required. A bit capital-intensive though.