I'll Spell It Out For You, page-77

I reckon the 600K at .076 was some drip who bought earlier in the day and urgently needed cash to fund the purchase. Big risk these days to play the market without the cash to fund your purchases at day's end. T+ 2 and computers has sorted that sort of behaviour out for good.
Gone are the days when your friendly broker would give you some latitude to pay a day or two late. However we don't pay the same amount of brokerage fee as we did in the past either. Take care when you try to make a quick QUID..!!!