NEW YORK ( TheStreet) -- Years of weak economic and labor market growth put the term "green shoots" in the dustbin of lame clichés parroted on Wall Street. However, the phrase is now of central importance to the earnings and stock performance of Wells Fargo ( WFC), the nation's largest mortgage lender and fourth-largest bank by assets. In 2009, as stock markets hit a financial crisis bottom, so-called "green shoots" of economic growth sprouted in analyst research notes and in the business media to explain a swift recovery in stock prices and particularly those of bank stocks such as Wells Fargo ( WFC) and JPMorgan ( JPM). Green shoots were meant to signify a flowering of economic recovery in the U.S. from the wreckage left by the mortgage meltdown, the collapse of Wall Street and near-death experiences across the global economy. Some such as Nobel laureate Paul Krugman were decidedly skeptical. As we now know, there has been below-trend gross-domestic-product (GDP) growth in the U.S. that is particularly weak coming out of a deep recession. The fall in the unemployment rate from generational highs, meanwhile, is largely attributable to workers leaving the labor force and not new job creation. In Europe, economic data continues to worsen and emerging market economies are beginning to show weakness. Google Trends data now shows people are about as likely to search for "bamboo shoots" as "green shoots," Jeffrey Sherman, a DoubleLine Capital portfolio manager, noted on a recent investor call. While Sherman's point was to highlight how investor misconceptions often carry the day on Wall Street -- for instance the current mania over the Federal Reserve's so-called "tapering" to its bond buying -- it is also worth pointing out terms can be premature or relevant at a later date. In the case of Wells Fargo's fourteenth straight quarter of earnings growth, green shoots are finally germane to the San Francisco-based lender. In fact, a late arrival of green shoots in data on GDP growth, new business formation, mortgage applications and jobs are the only hope Wells Fargo has of growing its earnings in coming years, as interest rates rise from historic lows. It is now time to reintroduce the term to investors banking on the notion Wells Fargo's shares can move materially higher from current post-crisis highs.