Backwardation means the market wants the commodity now more than later. It benefits long holders who roll (they sell high and buy lower) and hurts short holders.
It appears in oil during supply shocks and in agricultural products before harvest. It is the opposite of contango.
Example: front-month crude at $90, next month at $87, six months out at $80. The curve is in backwardation; a long roll each month picks up a few percent if the shape persists.
Related: contango, roll, front-month, cl