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...Outline fundamentals of stock market trading high frequency and its effect on the synchronization requirements including some history how a nist disciplined clock works performance monitoring time ntp ptp servers summary i bid ask every has an price buyers pay sellers receive all traders know that you buy at sell ii spread difference between is or profit made by maker who handles transaction for example let s say abc buys shares from me sells them to thus making cent per share when investor makers do opposite what investors they iii decimalization many years stocks traded in fractional dollars tick was minimum amount could change it once cents then reduced finally new york exchange started decimal prices this spreads get smaller prior after...