We’ve noted a large fluctuation in last Friday‘s programme trading numbers out of the NYSE.
Consequently we’ve decided to chart the year’s overall trend. And doing so confirms a clear and prominent spike in programme trading on the NYSE at the end of June, and a smaller one at the end of March:
End of quarter and end of half-year algorithmic portfolio reshuffling, we guess.
Related link:
Goldman getting the hint on programme trading? – FT Alphaville

