The Market-Indexed Guarantee

“The cost of your energy will stay the same for the whole term, even if the wholesale price changes.”

A current Octopus Energy blog post that helps readers choose between its fixed and flexible tariffs. The line comes from the list of reasons to pick a fixed tariff.

Why it’s this techniqueThe tell is "even if the wholesale price changes." That clause names a force the buyer cannot control, the wholesale energy market, and says it will not reach their bill. The payout is plain too: the cost "will stay the same for the whole term." A plain version would say "Our fixed tariff has a set price." That describes the product but never points at the market, so it leaves the buyer's fear of bad timing alone. Here the market risk is named and handed to the seller. The nearby line "protected from any significant shifts in the energy market" repeats the same promise in softer words. The short "No sudden changes" header adds a calm reassuring tone, but it only frames the term and does not lead.

“If the price goes up, you only pay the price you froze it at. But if the price goes down, you just pay the lower price.”

Hopper's current App Store listing description, written by the developer to explain its paid price freeze for travel bookings. The line closes the paragraph that introduces the feature.

Why it’s this techniqueThe tell is the pair of terms tied to fares Hopper does not set: "If the price goes up, you only pay the price you froze it at" and "if the price goes down, you just pay the lower price." Each names a market move and says exactly what the buyer pays when it happens. A plain version, such as "Lock in today's fare," would cover only a rise and leave the buyer worried about a drop after booking. Covering both directions removes the reason to wait. The earlier sentences in the listing add a small fee and the chance to wait for a paycheck, which frame the freeze as a paid service. They support the term but do not lead. The two-way promise does the work.

“Backed by our Price Match Guarantee. We'll match the current product price of key online and local competitors (" Qualified Competitors ") for immediately available new products sold from Best Buy (excludes Marketplace Products, clearance, refurbished and open-box items).”

This is the opening of Best Buy's current public Price Match Guarantee policy page on its website. The line states the core promise before the page lists the rules.

Why it’s this techniqueThe tell is "We'll match the current product price of key online and local competitors." Best Buy names a force it does not control, the prices other stores set, and says what happens if one of them is lower: the buyer gets that price here. A plain version, "Low prices every day," only describes Best Buy's own pricing. It would leave the shopper worried that a better deal sits one click away. This line takes that worry off the buyer and puts it on the store. The exclusions in the brackets narrow the promise but also make the trigger concrete. The earlier boast "Unbeatable price" is a simple claim about value. It does not lead; the matching term does the work.

“You simply lock your rate today. If rates drop later, you can refinance with reduced closing costs.”

A 2020s Rocket Mortgage web page promoting its Rate Drop Advantage offer for rate locks made between November 2024 and March 2025. The line is the page's short explanation of how the offer works.

Why it’s this techniqueThe tell is "If rates drop later, you can refinance with reduced closing costs." The offer names something the lender does not control, the market rate, and says what the buyer gets if it moves. A plain version would say "Lock your rate today" and stop. That leaves the buyer afraid that waiting a month would have been smarter. Here a rate drop becomes a trigger with a payout, so locking now no longer looks like a bet on timing. "You simply lock your rate today" is a call to act. It leans on the promise to feel safe, and it does not lead. The payout is cheaper refinancing, not the lower rate itself, so the protection is partial.

“If you find a shoe for a lower price on another web site or in a shoe store, we will refund you 110% of the difference between the lower price and our price.”

Price-protection copy from the Zappos website in the 2000s, drawn from a corpus row. The line sits in the store's price policy, where the online shoe seller explains what happens if a buyer finds the same shoe cheaper elsewhere.

Why it’s this techniqueThe tell is "a lower price on another web site or in a shoe store." Zappos names a price it does not control, set by rivals it does not run, and says what the buyer gets if it turns up: "we will refund you 110% of the difference." A plain line such as "Our prices are low" would ask the buyer to trust the claim and still leave them wondering if they should shop around first. This line makes shopping around pointless, because any better price found later turns into money back. The extra 10% on top of the difference is a sweetener that makes the promise feel generous, but it rides on the price match and does not lead. The next sentence, about Zappos lowering its own price, is left out because it covers only the store's own moves.

“With this best-in-class program, you can lock in your price and rest easy. If the price drops shortly after your qualifying purchase, we’ll credit you the difference in additional coins.”

A current web sales page from precious-metals dealer American Hartford Gold describing its Price Protection Guarantee. The lines come from the page's explanation of how the program works.

Why it’s this techniqueThe tell is "If the price drops shortly after your qualifying purchase, we'll credit you the difference in additional coins." Gold prices move with the market, not with the dealer. The buyer's fear is paying today and watching the price fall tomorrow. This term names that outside event and says what the buyer gets if it happens: extra coins worth the gap. "Lock in your price" frames the deal as protection from bad timing. A plain version, such as "Buy gold with confidence from a trusted dealer," would promise nothing about the market's next move. The closing lines, "No guesswork. No anxiety." and "rest easy," add reassurance about calm and peace of mind. That supports the promise but does not lead. The credit for a price drop carries the move.

“WE'LL BEAT ANY PRICE ON TVs!*”

A February 1993 Circuit City print display ad in the Granite City Press-Record, a local Illinois newspaper, running inside a TV, camcorder, and appliance ad block under a "GET THE BIG PICTURE AT CIRCUIT CITY" heading. The line is the ad's price guarantee headline, marked with an asterisk pointing to terms not captured in the OCR.

Why it’s this techniqueThe tell is BEAT ANY PRICE. The line names a force Circuit City does not set, a rival's price, and promises what happens if one turns up: Circuit City goes lower. That takes the buyer's fear of finding a cheaper TV elsewhere off the table before they walk in. A plain version, Low prices on TVs, would only claim value and leave that fear alone. This is a weak fit though. The line never says how the beat works: match, undercut by how much, or refund a difference. The asterisk points to conditions the excerpt does not show, so the actual payout is missing. ON TVs narrows the scope but does not lead; the beat-any-price promise carries the move.

“If you can buy more cheaply elsewhere anything you have just bought from us, we will refund the difference.”

This is the original 1925 wording of John Lewis's price pledge, first displayed in the Peter Jones shop window and quoted in a Creative Review magazine retrospective on iconic advertising slogans.

Why it’s this techniqueThe tell is "buy more cheaply elsewhere" paired with "we will refund the difference." The pledge names a force the shop does not control, what rival sellers charge, and states the payout if that force moves against the buyer. A plain version, such as "Our prices are fair," only asserts a claim about this shop's own pricing and leaves the buyer wondering whether to check elsewhere first. Here that check becomes pointless, because any lower price found later turns into money back. The line covers only one direction, a later lower price, not a later rise, so the protection is one-way. Nothing else in the short text shares the load; the refund term alone carries the move. This is a clean, early instance of the technique, later echoed by John Lewis's own "Never Knowingly Undersold" slogan.

“If you find a lower price on the same new vehicle, we'll match it.”

A current Price Match Guarantee policy page from Leonardtown Ford, a car dealership, published on its website. The line closes the page's short statement of the offer.

Why it’s this techniqueThe tell is "If you find a lower price on the same new vehicle, we'll match it." That names a price the dealer does not set, a rival's price, and states the payout if it turns up. The opening line, "Bring us a written offer for any new vehicle that we have in stock, and we will match that offer," makes the same promise, but asks for a written offer rather than just a lower price found. A plain version, "Great prices on every new vehicle," would only claim the deal is good and leave the buyer wondering if a better one sits at another lot. The middle line, "we make sure you get the best deal without the hassle," is a bare quality boast. It supports the promise but does not lead.

“If you find a lower price from local grocery stores on an identical, in-stock dairy product, tell us and we'll match it.”

KD Market is a grocery chain's current published dairy price-match policy page. The line sits in the policy's statement of the price-match term for identical, in-stock dairy products.

Why it’s this techniqueThe tell is "If you find a lower price from local grocery stores on an identical, in-stock dairy product, tell us and we'll match it." KD Market names a price it does not set, what rival stores charge for the same dairy item, and says what happens if that price is lower: it will match it. A plain version, "We offer low prices on dairy," only describes KD Market's own pricing and leaves the shopper wondering if a rival is cheaper. The opening line, "KD Market is committed to providing low prices every day," is a general low-price claim. It supports the match but does not lead. The promise is narrow, limited to one category, dairy, and to stores the buyer already checks, which makes this a clean but modest fit.

“Your rate does not change, even if market prices increase, which helps protect you from sudden bill spikes.”

A current web page from Texas retail electricity provider Chariot Energy describing its fixed-rate plan. The line sits in the plan explanation, right after the plan locks in a per kWh price for the contract term.

Why it’s this techniqueThe tell is "even if market prices increase." That clause names a force outside the seller's control, the wider electricity market, and pairs it with a payout: "Your rate does not change." A plain version, such as "Get a fixed-rate plan," only describes the product and leaves the buyer's fear of bad timing untouched. Here the market move is named and its effect on the buyer is cancelled. The promise runs one way only: it says nothing about what happens if market prices fall, so the buyer keeps the higher fixed rate in that case. "Which helps protect you from sudden bill spikes" restates the benefit in plainer terms but does not add a new move.

“Secure your fuel gallons at a set maximum price per gallon and you will never pay more than that price. But, if the price of fuel drops on the day you receive a delivery, you pay the lower price, guaranteed.”

A current Price Protection Programs page from Palmer Gas & Oil, a New England home heating fuel dealer, explaining how its price-lock plan works for delivery customers.

Why it’s this techniqueThe tell is the pair of promises tied to fuel prices the dealer does not set: you 'will never pay more than that price' if prices rise, and 'if the price of fuel drops on the day you receive a delivery, you pay the lower price, guaranteed' if they fall. Both directions of the market are named and both have a concrete payout. A plain version, such as 'Lock in your fuel price for the season,' would only cover a price rise and leave the buyer afraid a drop would cost them. The closing line, 'This plan protects you whether fuel prices go up or down,' restates the promise as a tagline. It sums up the term but does not add a new payout, so it supports rather than leads.