The value of my Roth IRA from a conversion that I made earlier in 2015 declined so I recharacterized part of it as a traditional IRA in September. Is there any limit on the number of partial recharacterizations I can make?

Appreciation in value

Increase in value of property due to market conditions. When you sell appreciated property, you pay tax on the appreciation since the date of purchase. When you donate appreciated property held long term, you may generally deduct the appreciated value.