Asthedoohickey hummed away ataveryhigh frequency-a whopping 6 billion cyclesper second-the "piezoelectric" material in itproduceda warbling electric field that waseasy todetect.
Behind all the glitches is a trend, the rise of algorithmic and high-frequency trading to a level of prominence that would have been unimaginable as recently as the 1990s.
His first job at a high-frequency trading operation was as a quantitative research analyst at Citadel, a giant Chicago hedge fund, which he joined in early 2009.