$SPOT tokens are designed to follow the $AMPL price, but without exposure to the rebase, and can be redeemed 1 to 1 for $AMPL tokens at any time on the Spot minting app.

Spot is an inflation resistant store of value token which targets the 2019 $1 USD, built on top of the Ampleforth protocol. As a simplest possible explanation: Take your AMPL tokens, deposit them into the SPOT minting app > mint $SPOT tokens.

$SPOT tracks the price of $AMPL, but $SPOT does not rebase. You can redeem spot one to one for $AMPL via the SPOT minting app.

When you deposit AMPL tokens into the SPOT app, these tokens are split into 2 “tranches” (into two different tokens) of tokens, called a-AMPL and z-AMPL, at a 20% - 80% ratio. If you deposited 100 AMPL into the Spot app, you would get 20 a-AMPL tokens and 80 z-AMPL tokens.

• A-AMPL tokens get turned into $SPOT (the new tipping token on Publish0x!), and again, these tokens DON’T rebase, and they are redeemable 1-1 for AMPL regardless of current AMPL price.
• The Z-AMPL tokens do still rebase. Infact, they are essentially leveraged and represent the full initial amount of AMPL. In our hypothetical case in which we've deposited 100 AMPL into the Spot app, we would get 80 z-AMPL tokens and 20 a-AMPL tokens. While 20 a-AMPL (essentially SPOT) tokens do not rebase at all, the 80 z-AMPL rebases as much as the original 100 AMPL would rebase; essentially, z-AMPL is leveraged 1.25x the normal AMPL rebase.

SPOT tokens are designed using Buttonwood (an Ethereum-based smart contract set that provides the building blocks for designing DeFi protocols).

Here is the full Spot info site and whitepaper: https://www.spot.cash/ 

Further Reading on $Spot

• https://www.forbes.com/sites/martinrivers/2022/12/08/how-spot-by-ampleforth-could-become-digital-cash-to-bitcoins-digital-gold/?sh=63f5f7996984
• https://blog.ampleforth.org/spot-the-inflation-resistant-store-of-value-87e8112468b2