The Bernstein Bible recommends 5% for a relatively risk-tolerant investor, no more than 15%, if I recall correctly.
Aren't we all supposed to nod sagely and pat each other on the back when one asset class, or another, or even all of them, head down? And congratulate ourselves for having the wisdom to rise above the general dysphoria?
It's hard to stay the course, I'll bet, especially after you retire. I'm trying to get the hang of it. I called Vanguard today to move all my old 401(k)'s which are invested hither and yon. I got the happy news that if I move $100K or more of old IRAs into Vanguard at once, I get a professional handholder free of charge to fill out all those pesky forms for me to sign. I didn't turn it down!
Soon I'll be asset-allocated a la Bernstein/Burns/Bogle. Next I buy some rental property, I think.
Anne