The market’s price gyrations have been subdued of late. What it means when, not if, the flux starts again. : For hedge funds, volatility is wonderful: a chance to make a bundle by trading on stock movements, using their ultra-fast computers. For the rest of us, it can be unnerving. Yeah, you’ve heard about the virtues of by and hold, which argues that market gyrations are best ignored because you ain’t touching your portfolio. The thing is, regular investors do need to touch their portfolios. Maybe it’s to pay taxes, which are due next month.