Financial fact based activism to propagate or promate your belief system. It can be either a choise of purchase or sale or investment. Basically you use your spending or earning power to support your ideology.
Iactivism or Invactivism is one of such behaviour where you (Investment+activism) use your investment power to support your ideology. If you are a muslim then you may choose to invest only in a mutual fund which is halal certified or sharia compliant index. May be there is someone who likes to support Small & medium businesses because most of the innovation, invention is done by small & medium businesses which are then bought by bigger businesses or when these SMBs become big, their capacity to invent, innovate criples. So you might want to just invest a big, as big as 50% of your investment in small & mid cap mutual funds. You have capitalism ? Then what better way there is not invest all of your investment in only small to mid cap mutual funds. There are many who use their purchasing power for religious ideology, halal or kosher are a few of those. You only buy products which are halal certified or from muslim vendor to retain your money within the community of your religion. What about you? You wanna show a finger to the capitalism, say fuck you to big businesses and invest against them by investing in small & midcap mutual funds or you will invest in big whales of the stock market & keep virtue signaling the others.
