Qm

Topic · Derivatives & Volatility

← All topics

Greeks & Hedging

23 articles · 3 checkpoints · 13 deeper reads · 7 reference notes

Every article, in reading order

plant a flag as you finish each

Read these first

  1. Black-Scholes assumes you can rehedge continuously for free. In reality every rehedge costs money, so a trader has to pick how often to touch the hedge, too rarely and the hedge tracks poorly, too often and fees eat the position alive.

  2. A hedge you set up once and never touch again is a static hedge; one you have to keep rebalancing as the market moves is dynamic. The choice between them is a trade-off between transaction costs and model risk, not a question of which is 'better.'

  3. A trading book's profit or loss on any given day is one number. PnL attribution splits that number into the pieces the Greeks predicted, delta, gamma, theta, vega, plus whatever is left over, which is the part nobody can explain yet.

Then the rest

Reference notes7 short entries