ZEC Rallies 9.5% Ahead of Zcash Upgrade That Triples Block Speed

Zcash's ZEC tore ahead of the market on Nov. 4, climbing 9.5% in 24 hours as traders positioned for the NU7 network upgrade. CoinGecko had ZEC at $1,321.90 in a snapshot updated at 11:51 a.m. ET. Over that same window, bitcoin added 4.0% and ether rose 6.3%, according to The Defiant. Even after the pop, ZEC is still short of the $1,600 mark it cleared back in September.

NU7 isn't timed to a clock — it fires at mainnet block 3,543,405, per the Zcash Foundation's Zebra 7.0.0 release announcement. The Foundation expects that to land around Nov. 5. A ZecBlock API snapshot pulled at 11:53 a.m. ET on Nov. 4 still showed the upgrade pending, with indexed mainnet height sitting at 3,541,793.

The headline change under ZIP 218 is speed. Target block spacing drops to 25 seconds, down from 75 seconds, which shortens the expected wait for a first confirmation — a real quality-of-life bump for anyone paying with ZEC or shuttling funds to exchanges. The Foundation is careful to note it's a target, not a promise that every block lands exactly 25 seconds after the last. To keep the schedule honest, block rewards get divided by three and halving intervals measured in blocks get tripled, holding daily issuance roughly flat and preserving the four-year cadence.

NU7 also rewires where transaction fees go. Per the Foundation, 60% of each block's fees flow into a reserve for future block rewards, while miners keep the remaining 40%. That reserve doesn't start paying out at activation — reissuance kicks in later, at block 8,939,664.

For node operators, the clock is already ticking. They need NU7-compatible software installed before activation; the Foundation calls Zebra 7.0.0 the first stable mainnet release supporting NU7 and warns that older nodes will get dropped by upgraded peers and drift onto a different chain. There's a second deadline buried in the fine print: the deployment spec says NU7 invalidates the transaction format used by Sprout, the legacy shielded pool, meaning any funds left sitting there become unspendable once the upgrade goes live.