Sun, Moon, Saturn & Mercury will be in Virgo on 7th & 8th October. This is a major event & its impact is likely to affect you personally.
Few days in October are positive, while few of them are negative, thus do not rely on it.
In the past, when the monthly weight-age was zero, Nifty was: Jan 2008 = -1000, Oct 2008 = -1398, Oct 2009 = -362 & Feb 2010 = only 2. This is just for your reference. You are free to take your decisions without being biased or playing the blame game.