PVLV is a fancy way of saying "preference for very low volatility." It means that someone likes their investments to be very stable and not too risky. Think of it like playing with toys - some kids like playing with toys that move around a lot and some like playing with toys that stay in one place. People who like PVLV are like the kids who like to play with toys that stay in one place. They don't want their investments to move around too much because it can be scary and they want to feel safe. So, they choose investments that are less likely to change too quickly or too dramatically. This way, they can feel more comfortable knowing that their money is safe and won't disappear or go down too much in value.