When do you know that Wall Street has officially succeeded in turning back the clock 5 years? When the market’s collective mind state has been reconditioned to the point where analysts feel comfortable creating research notes with titles like this one: “Keep Calm and Lever Up.” That was the title of Citi’s 2015 outlook piece and it served as a precursor to several missives the bank has released over the past two months wherein Citi strategists pound the table (hard) on why now is the time to wade into synthetic tranches.