I have a large position in VGIAX, which is intended to beat the S&P500, but in reality hasn. I've found, because it's actively managed, it's very tax inefficient by paying large capital gains from internal fund rebalancing. The downturn over the last few days has put me to a nearly even position. Is it a good idea, to sell all the shares now to avoid much capital gains, and then re-buy VOO in it's place?
Secondly, I just tried to do this and received [this warning message](https://imgur.com/a/xtcDPlM) from Vanguard. Does this mean, if I sell my whole position, I can't use these funds to buy VOO for 30 days?
Assuming this is a good strategy, is it still advisable if I can't buy back in for 30 days?