Generally speaking, when stocks fall bond prices rise. In this regime. So if you have a mixed portfolio of assets and bonds, in your scenario you can sell treas

Generally speaking, when stocks fall bond prices rise. In this regime. So if you have a mixed portfolio of assets and bonds, in your scenario you can sell treasury bonds for a profit, and use the proceeds to buy up stocks. If you automate this transaction when your portfolio deviates from a target mix, you will automate a 'sell high, buy low' strategy.