Affect versus Effect.
An easily confused pair. Affect with an a is usually a verb; effect with an e is (usually) a noun. When you affect something, you have an effect on it. The usual adjective is effective, which means “having the right effect,” or “getting the job done” — an effective medicine, for instance. (It can also mean “in effect,” as in “the new policy is effective immediately.”)
If the usuals leave you curious, here's the rest of the story: affective as an adjective means “relating to or arousing an emotional reaction”; effect as a verb means “to bring about” or “to accomplish,” as in “to effect a change.” There's also the noun affect, usually used in psychology, meaning “an emotion” or “feeling.”
http://andromeda.rutgers.edu/~jlynch/Writing/a.html What type of effect has BTC had on you?
The market has been affected lately...
Are you effective or an after affect?
Anyone want to try to have an effect on this topic?
thank you very much indeed 
