Quote from kenwx23:
Since SH is just a short S&P fund, isn't buying shares of it equivalent to selling off some of your SPY position?
Whoa, registered in 2009 and first post at the end of 2011 in my thread

The answer to your question is yes and no.
Selling off some SPY and then buying it back, selling it again, etc., may result in extra wash sales. But the main reason is I prefer to treat them as two separate trades. It's easier for me to manage the trades that way, and easier to envision what is happening, and it's also psychologically rewarding to close the short position for a profit (rather than buying back some of the same SPY shares I would have sold earlier).
Also, by holding more SPY I potentially receive more dividend.