If you have appreciated stock that you’ve held more than a year, and you plan to make significant charitable contributions before year-end, keep your cash and donate the stock (or mutual fund shares) instead. You’ll avoid paying tax on the appreciation but will still be able to deduct the donated property’s full value. If you want to maintain a position in the donated securities, you can immediately buy back a like number of shares. (This idea works especially well with no load mutual funds because there are no transaction fees).