“…3 For example, Cadenillas and Pliska (1999), Dammon, Spatt, and Zhang (2004), Gallmeyer, Kaniel, and Tompaidis (2006), Ben Tahar, Soner, and Touzi (2010), Ehling et al (2010), Marekwica (2012), and Fischer and Gallmeyer (2012). 4 As shown in DeMiguel and Uppal (2005), an investor rarely has more than one cost basis, and as shown in the Appendix, the certainty equivalent wealth loss from following a single-basis strategy (which is a feasible, but suboptimal strategy in our model) is almost negligible (to keep a single basis, one needs to liquidate the entire position before any additional purchases can be made).…”