stockmarketer on another thread inspired me to do a deeper analysis of my own stats by month corrected for portfolio size (so trying to factor out the growth of my portfolio to see just the seasonal variations). The findings are from stats over the last 6 years.
I found almost the exact same thing as him but thought I'd post my findings just in case they are of any use to anyone, and to see if others found similar trends.
Starting January: Feb up, Mar up, Apr down, May down, Jun down, Jul down, Aug down, Sept up, Oct up, Nov down (surprised here, thought Nov would still be up), Dec down.
March and Oct being the top two months, December bottom, followed by Jul/ Aug.
Here's the percentage of total years income breakdown by month:
Where the "average" month would be 8.33 percent (100/12)