New Ask Claude or ChatGPT about any stock, using Bullpen. Bullpen in Claude or ChatGPT. 7 days free

Tuesday, November 10, 2026

Back to the front page

From X

@convequity

Convequity on X

$RBRK's backup engine breaks data into fixed-size blocks, for example 4 MB, and stores only the unique blocks across backups. Commvault and Cohesity instead divide data into variable-sized chunks, with the boundaries set by the content itself. Each design has a trade-off. With fixed blocks, a small change inside a block means the whole block gets written again, so Rubrik uses more storage. In return, hashing and comparing blocks is simple, which means faster backups and lower compute overhead. With variable chunks, only the changed portions are written, so storage use is much lower. Working out chunk boundaries and hashes as the data comes in takes more CPU and memory, which can slowdown backups. Cohesity offsets part of this with a scale-out architecture that processes in parallel across nodes. The two designs fit two different jobs. Variable-length deduplication suits long-term archives, where storage cost matters more than speed. Fixed-block deduplication suits recovery after a hack or ransomware attack, where fast restores and predictable performance matter more than saving storage. That matches how each company started. Rubrik came into the market in 2014 focused on security and on getting critical data back quickly after a breach. Cohesity started from a different idea. It built its own file system that spreads data across many servers, each with its own computing power. Backup copies stay readable like normal files, so companies could search and analyze them where they sit, without restoring them first. Security came second. The two are now moving closer together. Cohesity has leaned much more into security and recovery, especially after buying Veritas's backup business in 2024.

Airbnb 3Q26: Business Update

Airbnb’s 3Q26 revenue rose 19% to $4.9 billion as nights and seats grew 16%, with app bookings up 29% and Reserve Now Pay Later adding…

Research update

S&P Global research will assess Platts, Kensho and ratings growth; Benefit Systems’ 72% YTD rally changed its valuation, while Netflix and…

The AutoNation Story

AutoNation shed rentals and megastores, focused on dealerships, and retired 91.1% of its shares through buybacks after its 1990s roll-up…

The 10-Q Fills In the Buyback

Empire State Realty Trust bought $86.1 million of stock through November 6, while corrected sum-of-the-parts values range from $9.12 to…

No title

SpaceX’s $24 billion Starbase power plant, Microsoft’s Oracle capacity cuts, Riot’s $72 billion AI lease and Quanta’s sell-off frame…

AUTLF · long

Austal Limited

Austal is a naval and commercial shipbuilder operating in the U.S., Australia and Asia.

Publications we follow

Every publication on this site, hand-picked.

130 publications

Newsletters 110

X accounts we follow

Every account on this site, hand-picked.

91 accounts

Investor letters we follow

369 firms

Sectors

Ordered by how often our editor reaches for them.