If a single stock captures the bizarre world of finance in the past year, it is forklift fuel-cell maker Plug Power.The story consists of wacky financial engineering, a company that started the year flirting with penny-share status and became one of the country’s 200 most valuable, a bet on clean transportation that contains awful environmental ratings, and a multi-hundred-million-dollar profit for Amazon. To top it all, this is the second time in two decades that Plug Stock has gone full-bubble.The craziest part is that Plug Power reported discouraging revenue last year, a difficult-to-gain feat. Sales lower than zero is something normally reserved for a clutch of mortgage funds that consist of old accounting. Cruise line carnival had discouraging revenue for one quarter last year for boring reasons: massive refunds for canceled trips. Plug Power’s sales were discouraging for a truly bold reason: The share price went up. The company structured some sales so that when clients bought enough forklift power units, they got a discount in the form of warrants, the right to acquire shares at a fixed price in the future.