Bullpen.News From Edwin Dorsey
Get Daily Recap Feedback

Tuesday, September 29, 2026

Back to today

Toll roads in the sky

Asia's elevator boom favors maintenance and modernization providers, with Otis deriving nearly 90% of operating profit from after-sales services rather than new installations.

OTIS $24B
Asian Century Stocks 1 click

From X

@convequity

Convequity on X

Batch size sets the trade-off between speed and cost in AI inference. An AI server answers many users at once by bundling their requests into one batch. Our $CBRS note compares this to running a bus. There are two ways to run it, and each gives something up. 1. Fill the bus. Put as many passengers as possible on every run. More stops slow each passenger's trip, but the cost of the run is spread across more people, so the cost per passenger falls. Larger batches do the same: each user's answer is slower, and the cost per token falls because the system produces more tokens from the same hardware. 2. Carry fewer passengers and stop less. Each trip is faster, but fewer seats mean the cost of the run is spread less well, so the cost per passenger rises. Smaller batches are fast for one user and raise the cost per token. So in the analogy, speed for each user is how fast each passenger arrives. Cost per token is cost per passenger. A system set up for one gives up some of the other. When someone compares two inference systems, check the batch size behind each number. A speed figure or a cost-per-token figure quoted without it cannot be compared fairly.
@KEDM_COM

KEDM.com on X

ProQR Therapeutics $PRQR CEO Daniel de Boer bought $513K across two separate purchases on July 7 and July 9, and a company director bought another $229.5K in late June (real money for a Dutch CEO). PRQR is a small-cap RNA-editing biotech backed by a major pharma partner: Eli Lilly. Their collaboration, running since 2021 and expanded in 2022, could pay ProQR up to $3.75 billion in milestones plus royalties, real validation for a company this size. The balance sheet just got stronger too: ProQR raised roughly $59 million in late June 2026, with Lilly buying in alongside the public offering to keep its stake intact, a vote of confidence from the partner who knows their science best.

Investor Letters

All letters

Uber: The Aggregator on Trial

Uber's $193 billion in gross bookings and $10 billion in free cash flow contrast with modest stock gains as autonomous vehicles and…

DASH $81B
MBI Deep Dives 2 clicks

On’s Premium Playbook

On Holdings targets premium growth through 2029, using LightSpray soccer cleats and higher pricing, with ASPs rising from $145 to $170…

ONON $9.8B
TSOH Investment Research 4 clicks
SFIX · long

Stitch Fix INC

Stitch Fix’s 2017 IPO rested on overly ambitious long-term growth expectations and an unrealistic definition of its addressable market.

SFIX $347M
Value Investors Club 1 click

Hindsight Capital

Hindsight Capital tests crisis-era investment decisions using anonymized company financials, including TransDigm, Halma and Texas Pacific…

TDG $60BTPL $23B
Rebound Capital 6 clicks

Publications we follow

Every publication on this site, hand-picked.

110 publications

Newsletters 93

YouTube 4

Blogs 12

Seeking Alpha 41 of 198

Nominate a publication

X accounts we follow

Every account on this site, hand-picked.

72 accounts
Nominate an account

Investor letters we follow

189 firms

Sectors

Ordered by how often our editor reaches for them.