Admittedly, the Shiller P/E isn't a timing tool and provides no clues as to when equities hit a temporary top. But when ...

Motley Fool Capital Efficiency 100 Index ETF (NYSEARCA:TMFE – Get Free Report) was down 0.8% during mid-day trading on Friday . The stock traded as low as $27.94 and last traded at $27.96.