Buy the dips. That has been great investment advice for the past 40 years; at least in all the world's leading equity markets bar Japan. Along comes a bout of weakness; for a while the markets look as sick as a dog; the pundits breathlessly speculate whether or not we're in a real bear market. What do you do? Go out and buy the stocks you had been monitoring for months but always looked too expensive; for good measure, maybe top up with calls on the major market indices, too.