With a $9.95 trading commission, I have the same problem, but compounded since My plan is to accumulate in my work RSP off my pay check, then transfer to self directed ETFs annually for no fee except my trading commission. My personal ETF minimum buy limit is $2500 in order to keep my MER low, low, low.
My self directed ETF accounts carry $50-$200 in cash DRIP left overs for months at a time till I contribute another lump. Am I wasting returns for the sake of keeping fees low?
Are mutual funds no charge to trade in a self directed account that charges commissions? I could see buying index mutual funds for short periods of time to put my cash to work.