Prospect theory's central finding: people evaluate outcomes as gains or losses from a reference point, not as final states — and the pain of a loss outweighs the pleasure of a same-sized gain by roughly two to one. The value curve is steeper on the loss side.
This asymmetry spawns predictable behaviours marketers work with daily. The endowment effect: once something feels mine — a trial, a cart, a streak, a wishlist — giving it up registers as a loss, so I'll pay or act to keep it. Status-quo bias: switching brands means risking a loss, so incumbents enjoy a defensive moat. Sunk-cost pull: investment already made (money, effort, streaks) makes quitting feel like losing.
Framing is the lever that decides which side of the curve a decision lands on. "Save ₹200 by ordering today" (gain frame) and "You'll lose your ₹200 credit tonight" (loss frame) describe the same fact, but the second borrows the steep side of the curve. Similarly, insurance sells almost entirely on loss frames, while lotteries sell on gain frames — each matches the frame to the emotion that drives its category.
The reference point itself is movable, which is where framing meets anchoring: a "₹100 delivery fee" is a loss; "free delivery above ₹499" turns the same economics into a gain to be unlocked.