Microsoft's spreadsheet program can do way more than you might imagine. These are the hacks and tricks you need to know.

My 93-year-old grandmother lives with my mother in the annex of a rented home. For some time, they have been estranged from my aunt, who lives abroad. Before they stopped speaking, my grandmother set ...

Stochastic volatility is the unpredictable nature of asset price volatility over time. It's a flexible alternative to the Black Scholes' constant volatility assumption.