Four Points Beginner Risk Managers Should Learn from Jeff Holman's   Mistakes in the Discussion of Antifragile
  Using Jeff Holman's comments in Quantitative Finance to illustrate 4 critical errors students should learn to avoid: 1) Mistaking tails (4th moment) for volatility (2nd moment), 2) Missing Jensen's Inequality, 3) Analyzing the hedging wihout the underlying, 4) The necessity of a numeraire in finance. 
Nassim Nicholas Taleb
q-fin.GN q-fin.RM