> Both bulls and bears claim that the recent growth in margin debt supports their outlooks.

Yup. I borrowed (pun unintended) a term from ham radio. SSB, I call it Self-Serving Bullshit.

Here's a list of 151 cognitive biases, the most readable list I found. [0]

I often wonder, with so many biases, how anything at all gets done right.

[0] https://gustdebacker.com/cognitive-biases/

> I often wonder, with so many biases, how anything at all gets done right.

Humanity has been working on that problem for a long time: objectivity, empirical evidence, reason, ...

> $1.13 trillion

… but what's a few tens of billions between friends?