Wall Street is a cunningly complex film. The screenplay is amazing, the acting is powerful (particularly the on-screen tension between Sheen and Douglas), and the direction (of renowned Oliver Stone) is perfect. Taut, intelligent movies don't get much better than this, folks.
Except for a gratuitously "weird" ending, this is a masterpiece. it captures the essence of America's increasingly thin social fabric, illuminating, in advance, not just the Reagan years, as some would have it, but the slippery slide into narcissism this country has experienced in the last half century. And Peter Sellers never did it better.