Warren Buffett himself once wrote an article explaining how Benjamin Graham's principles are everlasting, their results irrefutable, and his followers consistently exceptional. It's called "The Superinvestors of Graham-and-Doddsville".

Regarding why Value investing continues to give exceptional returns, he wrote:
"the secret has been out for 50 years, ever since Ben Graham and Dave Dodd wrote Security Analysis, yet I have seen no trend toward value investing in the 35 years that I’ve practiced it. There seems to be some perverse human characteristic that likes to make easy things difficult."

Value investors - though numerous - still remain a small minority in comparison to (those who Graham called) speculators.

Buffett also wrote of Graham's "superinvestor" students that:
"These are men who select securities based on discrepancies between price and value, but they make their selections very differently."

Perhaps that analogy can be extended beyond Graham's students to all value investors.

For example:
Graham said "Confronted with a like challenge to distill the secret of sound investment into three words, we venture the motto - Margin of Safety."
Seth Klarman says “Loss avoidance must be the cornerstone of your investment philosophy.”

Essentially, Klarman is saying the same thing Graham did half a century ago.

But most of what Graham actually taught has been forgotten today, and things he warned against are often attributed to him instead.

Even when Graham's recommended methods are used, they are modified - often beyond recognition - to fit the stocks, rather than having stocks clear them.

Graham actually specified a very precise and detailed investment framework, with 17 qualitative and quantitative rules for stock selection.

Serenity Stocks lets you assess 5000+ NYSE and NASDAQ stocks against all 17 rules; with no alterations other than adjustments for inflation.