Here is how you can really make this work for the stock market. Link the MPESA platform to reputable stock broking houses, allowing people to buy and sell shares by charging their Mpesa accounts. Then offer the 'mpesa your mkopo' facility to such equity traders and voila! You have a margin account. It will do wonders for hard up share traders like me.
"The opposite of a correct statement is a false statement. But the opposite of a profound truth may well be another profound truth." (Niels Bohr)