Bear Januszewski
Summer 2025 · live

Regime Change

A Relative Rotation Graph engine over a 63-year price database, built while learning quant work at 98|23 Capital.

63 yrs
of daily OHLCV, 1962 to today
13,674
tickers, GICS hierarchy, PCA benchmarks
267
passing tests

When and where I was

[BEAR WRITES: one sentence. Summer after freshman year, 98|23 Capital, Dallas.]

The question I was trying to answer

[BEAR WRITES: one or two sentences.]

What I built and how

[BEAR WRITES: two or three sentences. Name the stack and the hard part: DuckDB over parquet, PCA hierarchical benchmarks, the RS-ratio log scaling.]

How it ended

[BEAR WRITES: honest, one or two sentences.]

What I took forward

[BEAR WRITES: one sentence.]