Responding to an earlier post, a few readers have wondered if I have considered increasing the equity component of the portfolio in a severe bear market, a tactic gingerly suggested by William Bernstein in The Four Pillars of Investing (read review):

Ideally, when prices fall dramatically, you should go even further and actually increase your percentage equity allocation, which would require buying yet more stocks. This requires nerves of steel and runs the risk that you may exhaust your cash long before the market finally touches bottom. I don’t recommend this course of action to all but the hardiest and experienced of souls. If you decide to go this route, you should increase your stock allocation only by very small amounts — say by 5% after a fall of 25% in prices — so as to avoid running out of cash and risking complete demoralization in the event of a 1930s-style bear market.

I did consider trimming back the allocation to bonds after a severe decline but haven’t acted it. It’s just that I’m not entirely comfortable making tactical changes to asset allocation even when it makes perfect logical sense.