As for last week's stock-market correction, Lowry was expecting a "jolt" sometime between now and June.
"We're in a new secular bull market, but I've been expecting a correction of between 4 and 8 percent," he said.
RevenueShares ETFs more closely reflect the growth in the broader economy, rather than the distortions of cash flows and earnings of public companies, Lowry says. The S&P 500 companies' revenues should grow 4 percent to 5 percent in 2014, and GDP could hit 3 percent, he added.
"On a price-to-sales basis, the market is extremely cheap," Lowry estimated.
Since 1968, revenue for member companies of the S&P 500 index has fallen only five times, while the stock market itself was down 13 times in the same period.
"Stick with revenues," Lowry instructs, as an indicator of the market's health.
"We're currently in a new secular bull market, which started back in 2009. But there will be corrections," he predicted.
Lowry says he expects there could be another sharp correction after President Obama's second term ends in 2014, as there were after the second terms of Presidents Eisenhower, Nixon, Reagan, Clinton, and George W. Bush.
Local money managers such as Cumberland Advisors' David Kotok own RevenueShares Small Cap ETF, as well as PowerShares Dynamic Market Portfolio (PWC), Guggenheim S&P 500 Equal Weight ETF (RSP), the Russell 2000 Growth Index (IWO), and Guggenheim S&P 500 Pure Value ETF (RPV).
Research Affiliate's Rob Arnott ranks index funds' book values, cash flows, and sales and dividends.
But, Lowry said, "I think I've built a better mousetrap."