Investing Is Biology Not Physics
Markets evolve and adapt. Be careful extrapolating from the past.
Our thinking on options, trading, investing.
Markets evolve and adapt. Be careful extrapolating from the past.
The distribution of the stock market is different than the distribution of stocks
This is an example of a broad question we should always ask ourselves: "what would the random version of some process look like?"
Is it possible that factors overexplain excess performance?
Our instincts about the role of correlation are not well-tuned
When "disagreeable" is an adaptive trait
Possible pitfalls of thinking in percents with ratios
The arithmetic behind how increased volatility reduces average compounded returns
What high prices beg for
Compute the amount of dollars required to rebalance a levered exposure
The brutal arithmetic behind shorting
Leases are options with an embedded cost of carry
Options, volatility, and risk — written by traders, delivered when we publish.