I’m 35 and currently putting 10% of my $50K salary in a 401(k) — but I know nothing about the market. Should I just put everything in the S&P 500?

Imagine Charlie, a 35-year-old man who hopes to retire at 67, in time to qualify for the standard Social Security benefit.

I’m 35, an investing newbie and putting 10% of my salary in a 401(k) — should I just put everything in the S&P 500?

Imagine Charlie, a 35-year-old man who hopes to retire at 67, in time to qualify for the standard Social Security benefit. Charlie is currently making $50,000 per year and investing 10% of his income, ...