PT - JOURNAL ARTICLE AU - Thomas Neal Falkenberry TI - Survivorship Bias in the Development of Equity Trading Systems AID - 10.3905/jot.2006.628196 DP - 2006 Mar 31 TA - The Journal of Trading PG - 62--68 VI - 1 IP - 2 4099 - https://pm-research.com/content/1/2/62.short 4100 - https://pm-research.com/content/1/2/62.full AB - This article will outline the survivorship bias inherent in conducting trading system research on a universe of securities comprised of members of an index, or ranking system, where membership is based on capitalization of other proxy measures of liquidity. We will define a sample research universe and attempt to measure a portion of the survivor bias inherent in that universe. We believe five years is a representative time window across which traders are testing their strategies. As such, we will attempt to measure the bias across the five year period 12/31/98 – 12/31/03.TOPICS: Security Analysis and Valuation, in portfolio management