At the moment, my share portfolio is in the black by a small amount. The portfolio has some duds in it. Some of the other shares are good, just a bit lower than what I paid. A mental calculation tells me that I could sell the whole portfolio, as is and then buy back most of the same shares again, letting go of one or two companies that are real duds, and I would still be a little ahead after the broker fees. At tax time, the capital gains will be virtually offset by the capital losses.
The idea being that growth of my portfolio should be swifter after the shakeup, not being held back by the slow movers.
Good idea or not? If not, why?