One of Donald Trump’s big campaign promises, in addition to the one about kicking Mexicans out of the country and using the nuclear codes to blow up Dodd-Frank and other regulations, was that he was going to spend $1 trillion to fix America’s crumbling roads, bridges, airports, and other dilapidated, “third world” infrastructure. (Ivanka is fond of recounting how her daughter, Arabella, once walked by a pothole and remarked, “Grandpa would not like that.”) Unfortunately, there’s the small matter of paying for Trump’s big infrastructure plan, and according to former Federal Reserve chairman Alan Greenspan, the U.S. doesn’t have the money.

“The question is who is financing this trillion dollars in infrastructure,” Greenspan mused Thursday on Squawk on the Street. “At the moment, we can’t afford it,” he noted, explaining that the U.S. has “too much debt.” Clearly Greenspan hasn’t heard that Trump plans to eliminate the national debt—nearly $20 trillion!—a feat not achieved since 1835. (Or was that just hyperbole?)

In related news, the ex-Fed chief told CNBC’s Sara Eisen that he turns off his hearing aid when Trump speaks rather than listen to the man talk. Greenspan was specifically referring to when Trump said he thought the dollar was too strong, a remark that apparently drove old Alan up the wall, though we’re guessing it’s become a regular, Pavlovian response.

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Wall Street bets big on weed

As you may have heard or noticed first-hand, marijuana has become a big business, with a new report estimating the legal-marijuana market will create “more than a quarter of a million jobs by 2020.” Weed has become so popular, in fact, that analysts at the Cowen Group said Thursday they expect the cannabis market to overtake that of beer and that they are downgrading their rating for Molson Coors, saying that the company’s sales will be hurt “due to increasing marijuana use.”

“We believe alcohol could be under pressure for the next decade, based on our data analysis covering 80 years of alcohol and 35 years of cannabis incidence in the US,” analyst Vivien Azer wrote in a note to clients obtained by CNBC. “Since 1980, we have seen 3 distinct substitution cycles between alcohol and cannabis; we are entering another cycle.” According to Azer, in the three most recent alcohol-consumption cycles, “there was a notable inverse correlation with cannabis use.” Azer also noted that alcohol consumption among 18- to 25-year-olds declined for five years in a row through 2015, while marijuana consumption increased. The Trump administration, with its focus on jobs and stimulating the economy, has suggested it will crack down on recreational pot use, even in states where the drug has been legalized.

In other cannabis news, the Tumbleweed Express Drive-Thru, “the first U.S. drive-through marijuana dispensary,” was set to open Thursday in Colorado. “You actually drive into the building,” C.E.O. Mark Smith told Reuters. “A door opens up and you drive the car into the building and then the door closes behind you, like in a Jiffy Lube. So in essence, you’re inside the dispensary, but in a vehicle.” So much for economist Tyler Cowen’s Great Stagnation.

Area man tried to save Bill Ackman from Valeant

Last month, hedge-fund manager Bill Ackman sold his entire stake in Valeant Pharmaceuticals after losing a whopping $4 billion on the investment, which elicited what is thought to be his first known act of humility—an apology to Pershing Square clients. Sadly, it didn’t have to be this way. According to the Real Deal, Ackman was warned about Valeant in May 2015 by a guy who sold him a penthouse at 420 West Broadway for $17 million, when the stock was trading between $142 and $160 a share. Obviously, Ackman chose not to take the advice, and ended up exiting the investment when shares of the company were at a slightly less valuable $11.