Is there some math behind this? I.e. why would present money best be lump sum invested?
10k to invest @ 4% annual.
Initial Investment $10,000.00 $1,000.00
Month 1 $10,033.33 $2,003.33
Month 2 $10,066.78 $3,010.01
Month 3 $10,100.33 $4,020.04
Month 4 $10,134.00 $5,033.44
Month 5 $10,167.78 $6,050.22
Month 6 $10,201.67 $7,070.39
Month 7 $10,235.68 $8,093.96
Month 8 $10,269.80 $9,120.94
Month 9 $10,304.03 $10,151.34
Month 10 $10,338.38 $10,185.18
*edit* Obvious disclaimer for overly simplistic demonstration.