A BBC Radio 4 topical news comedy programme says that you can't make a movie featuring recession. I beg to differ. I think that we get reflections of how things are now, and inklings of things to come, from contemporary culture - think of Stravinsky's Rites of Spring and how the world changed shortly afterwards. Look out for films that echo these:
And I read long ago that some professional investors look for all sorts of straws in the wind, for example, the length of women's skirts (shorter = more confident, boomtime).