In my taxable account at Vanguard, I hold VTSAX and VTIAX. During 2018, they have delivered me about $5,000 and $10,000 in dividends, respectively. Because my VTIAX holding is down at the moment, I could sell enough shares to more than cover the $15K I have earned in dividends from both funds. Is there an easy way to determine whether or not it makes sense to capture the $15K loss in order to offset the $15K in dividends? Apologies if this is a silly question as I have never done TLH before and want to make sure I'm thinking about all of this correctly. Thanks in advance for any input!