John Dorfman

Dorfman: Ratings on the largest stocks – buy, neutral or avoid

Just about every year at this time, I offer ratings — buy, neutral or sell — on the largest U.S. stocks. These giants aren't ...

Dorfman: Robinson's DeFilippo wins 'Short Sellers Don't Have Horns' contest

Peter DeFilippo, an accountant for Bayer Corp. in Robinson, topped a field including three professional money managers to win my 14th annual "Short Sellers Don't ...

Dorfman: Can a billionaire race car driver be wrong?

I sold my shares in Penske Automotive Group (PAG) this year. But CEO Roger Penske has been buying shares like crazy. In a series of ...

Dorfman: Fat profit margins can be sign of great stock

How good is a company's profit margin? And is it growing or shrinking? Many investors don't pay much attention to profit margins. They are obsessed ...

Dorfman: 5 stocks show value, momentum

Stocks that are going up tend to keep going up. Quite a few academic and professional studies have shown that, although there's debate about whether ...

Dorfman: Cash flow can provide direction for investing in stock market

Years ago, I sponsored a debate between two prominent money managers about which measure was a better way to pick stocks — the price-earnings ratio ...

Where would late great stock guru Ben Graham invest?

If Ben Graham were alive to see today's pricey stock market, what would he buy? Every year, I try to pay homage to the man ...

Dorfman: Stocks clear series of hurdles to land place in 'Sane Portfolio'

My "Sane Portfolio" gets a major shake-up this year. As its name implies, the Sane Portfolio is intended as a moderately conservative portfolio. It's a ...

Dorfman: These 5 stocks show combination of value, growth

Looks or money? Brains or beauty? Value or growth? The world is full of false dichotomies. In the stock market, investors seek companies with good ...

Dorfman: 5 stocks with rapid revenue growth

Everyone likes companies with rapid sales growth. But the stock market is like a horse race in which the fastest horses must wear the ...

Dorman: Here's a stock market tool that isn't used much

Value investors live and die by ratios. One ratio that is helpful, but not used much, is the price/sales ratio — a stock's price divided ...