I thought you said capital gains was "for realized gains"? In which case $1000 of stock can't have $1000 of realized gains unless you paid $0 for it initially..

I thought you said capital gains was "for realized gains"? In which case $1000 of stock can't have $1000 of realized gains unless you paid $0 for it initially.. in which case, I'd say the resulting $150 tax bill falls into the category of "good problems to have". Edit: unless perhaps you're assuming that the $1000 you spent is considered to have come entirely from realized gains on what is actually a much larger position? If so then I can see your point.