Comment: (Jan 2010) After the long-term m.a. (10 years) which kept uptrend until end of 2007 changed the trend to downward, it already passed for 2 years. I presume that the US economy entered a new era when it went below 800 point of SP500. After that, it has been on steady recovery stage up to now, and it almost reaches the said long-term m.a. at around 1,200 point, however, it couldn't go over this line, but get into a correction. It would take a very long time for the long-term m.a. to have upward trend and in my view it wouldn't happen any more. Anyway, it depends on how Obama administration acts for US economy, however, I have no positive forecast.