KoinlyticsPendle listed principal token and yield token markets against the BlackRock ETHB staking yield stream. The PT lets a holder lock in a fixed ETH staking APY for the duration of the market, ending at maturity with exactly one unit of the underlying. The YT lets a buyer take pure directional exposure to future staking yield with no principal at risk beyond the YT premium paid.
Why this matters beyond DeFi natives
Every ETH staking ETF that ships is one more place where a TradFi allocator can earn yield without running validators. But TradFi does not have primitives to isolate that yield. Pendle does. A pension fund holding ETHB earns whatever the yield is. A Pendle user can, instead: buy PT-ETHB to lock in a fixed 3.4 percent for six months against ETHB collateral, or buy YT-ETHB to bet that Ethereum's post-Fusaka issuance changes will lift the staking APY above the current forward curve. Same underlying asset, three completely different bets.
The competitive frame
Pendle's original YT market was Lido stETH. The primitive scales linearly with any yield-bearing token, and the TradFi staking ETF wave is a large addressable universe of new underlyings. What was previously a DeFi-only game (stETH, sDAI, sUSDe, wstETH) now has a bridge to regulated staking product yield. That is a moat only Pendle currently has: nobody else has shipped the PT/YT split at scale.
The portfolio angle
If you already hold ETHB or a similar staking ETF, PT-ETHB lets you lock in the rate you want without leaving the ETF exposure. If you have a view that staking APY will rise (fewer validators, protocol changes, MEV recovery), YT is the leverage on that view. If you supply stables into the SY pool, you earn the swap fees on both sides of the market as both PT and YT holders rebalance.
What Koinlytics tracks: every Pendle position (PT, YT, LP) with days-to-maturity, effective fixed rate, and implied YT APY versus underlying so the yield curve of DeFi is a chart, not a spreadsheet.