Query: Should I re-allocate my portfolio now or let it balance out over time?

Relevant passages:
 <=SEP=> "As you note, your question is inherently opinion-based.  That said, if I were in your situation I would sell the stock all at once and buy whatever it is you want to buy (hopefully some index ETF or mutual fund). According to what I see, the current value of the HD stock is about $8500 and the JNJ stock is worth less than $500.  With a total investment of less than $10,000, any gain you are likely to miss by liquidating now is not going to be huge in absolute terms. This is doubly true since you were given the stock, so you have no specific reason to believe it will do well at all.  If you had picked it yourself based on careful analysis, it could be worth keeping if you ""believed in yourself"" (or even if you just wanted to test your acumen), but as it is the stock is essentially random.  Even if you want to pursue an aggressive allocation, it doesn't make sense to allocate everything to one stock for no reason.  If you were going to put everything in one stock, you'd want it to be a stock you had analyzed and picked.  (I still think it would be a bad idea, but at least it would be a more defensible idea.) So I would say the risk of your lopsided allocation (just two companies, with more than 90% of the value in just one) outweighs any risk of missing out on a gain.  If news breaks tomorrow that the CEO of Home Depot has been embezzling (or if Trump decides to go on the Twitter warpath for some reason), your investment could disappear. Another common way to think about it is: if you had $9000 today to buy stocks with, would you buy $8500 worth of HD and $500 worth of JNJ?  If not, it probably doesn't make sense to hold them just because you happen to have them. The only potential exception to my advice above would be tax considerations.  You didn't mention what your basis in the stock is.  Looking at historical prices, it looks like if all the stock was 20 years old you'd have a gain of about $8000, and if all of it was 10 years old you'd have a gain of about $6000.  If your tax situation is such that selling all the stock at once would push you into a higher tax bracket, it might make sense to sell only enough to fit into your current bracket, and sell the rest next year.  However, I think this situation is unlikely because: A) since the stock has been held for a long time, most of the gains will be at the lower long-term rate; B) if you have solid income, you can probably afford the tax; and C) if you don't have solid income, your long-term capital gains rate will likely be zero."

 <=SEP=> Personally I'm not a huge fan of rebalancing within an asset class. I would vote for leaving the HD shares alone and buying other assets until you get to the portfolio you want. Frequent buying and selling incurs costs and possible tax consequences that can really hurt your returns.

 <=SEP=> I would not sell unless the stock is starting to fall in price. If you are a long term investor you can review the weekly chart on a weekly basis to determine if the stock is still up-trending. Regarding HD below is a weekly chart for the last 4 years:  Basically if the price is making Higher Highs (HH) and Higher Lows (HL) it is up-trending. If it starts to make Lower Lows (LL) followed by Lower Highs (LH) then the uptrend is over and the stock could be entering a downtrend. With HD, the price has been up-trending but seems to now be hitting some headwinds. It has been making some HHs followed by some HLs throughout the last 2 years. It did make a LL in late August 2015 but then recovered nicely to make a new HH, so the uptrend was not broken. In early November 2016 it made another LL but this time it seems to be followed by a LH in mid-December 2016. This could be clear evidence that the uptrend may be ending. The final confirmation would be if the price drops below the early November low of $119.20 (the orange line). If price drops below this price it would be confirmation that the uptrend is over and this should be the point at which you should sell your HD shares. You could place an automatic stop loss order just below $119.20 so that you don't even need to monitor the stock frequently. Another indication that the uptrend may be in trouble is the divergence between the HHs of the price and the peaks of a momentum indicator (in this case the MACD). The two sloping red lines show that the price made HHs in April and August 2016 whilst the momentum indicator made LHs at these peaks in the price. As the lines are sloping in different directions it is demonstrating negative divergence, which means that the momentum of the uptrend is slowing down and can act as an early warning system to be more cautious in the near future. So the question you could be asking is when is a good time to sell out of HD (or at least some of your HD to rebalance)? Why sell something that is still increasing in price? Only sell if you can determine that the price will not be increasing anymore in the near to medium term.

 <=SEP=> This depends completely on your investing goals. Typically when saving for retirement younger investors aim for a more volatile and aggressive portfolio but diversify their portfolio with more cautious stocks/bonds as they near retirement. In other words, the volatility that owning a single stock brings may be in line with your goals if you can shoulder the risk.