ETF liquidity, electronic trading and rogue algorithms all came under renewed scrutiny in the wake of the Knight Capital debacle. But the pundits got it wrong: The ETF market is liquid and sound.

Focusing on a niche market is often considered the road to success, but even the most promising niches don’t always pan out. You may need to make a switch.

We checked back in with a few of the advisors profiled in this column over the years to see how they fared. Turns out, they took most of the advice, and did pretty nicely with it.

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