Relationship Lab

How a series has moved with others: the correlation of daily changes (% for prices, bp for rates) over 1 and 3 years, the beta, a rolling correlation and whether one tends to move first. Correlation is not causation, and it changes over time.

TWSE foreign net buy against…

Series	1M	3M	1Y ↓	n 1Y	3Y	3M − 3Y	Beta 1Y
KOSPI foreign net buy kr_foreign	0.64	0.57	0.57	20	0.57	0.00	13.50	scatter
TWSE foreign net buy (cumulative since 2026-08-13) tw_foreign_cum	0.56	0.53	0.53	29	0.53	0.00	0.59	scatter
INDOGB 10YR id10y	−0.52	−0.38	−0.38	23	−0.38	0.00	−2.58	scatter
Southbound net buy (cumulative since 2024-08-15) south_cum	−0.38	−0.38	−0.38	29	−0.38	0.00	−3.18	scatter
KOSPI foreign net buy (cumulative since 2026-07-31) kr_foreign_cum	0.56	0.35	0.35	20	0.35	0.00	9.93	scatter
PHLX Semiconductor (SOX) sox	0.08	0.29	0.29	28	0.29	0.00	7.04	scatter
DXY dxy	−0.09	0.16	0.16	28	0.16	0.00	27.10	scatter
Copper copper	0.12	0.16	0.16	28	0.16	0.00	5.68	scatter
Gold gold	0.68	0.14	0.14	28	0.14	0.00	5.49	scatter
Southbound Stock Connect net buy south	−0.15	−0.11	−0.11	29	−0.11	0.00	−0.66	scatter
LQ45 lq45	0.06	0.11	0.11	27	0.11	0.00	5.30	scatter
S&P 500 spx	−0.29	−0.08	−0.08	28	−0.08	0.00	−6.99	scatter
JCI (IHSG) jci	0.14	0.08	0.08	27	0.08	0.00	4.16	scatter
Brent brent	−0.21	−0.08	−0.08	28	−0.08	0.00	−1.64	scatter
Nasdaq 100 ndx	−0.24	0.07	0.07	28	0.07	0.00	4.01	scatter
Bitcoin btc	−0.08	0.07	0.07	29	0.07	0.00	1.18	scatter
USD/IDR usdidr	0.03	−0.06	−0.06	29	−0.06	0.00	−9.96	scatter
UST 2YR ust2y	0.12	−0.03	−0.03	28	−0.03	0.00	−0.27	scatter
UST 10YR ust10y	0.00	0.02	0.02	28	0.02	0.00	0.18	scatter
Newcastle coal coal	–	–	–	0	–	–	–	scatter

Compared with the headline cross-asset series and the series in the same catalog category and country. Changes are matched on common dates. Beta = change in TWSE foreign net buy per unit change in the other series (least squares, 1 year). Amber: fewer than 20 common changes (hover a value for its n). Stability: the 3-month correlation minus the 3-year one; ⇄ marks opposite signs. A change in correlation describes the past; it does not say the relationship has broken or will return. Data ↓

TWSE foreign net buy · KOSPI foreign net buy

20 60 120 252

Not enough common dates for a rolling correlation.

Rolling correlation of daily changes over the last 60 common readings, last 3 years.

Who moves first? (1 year)

Lag (readings)	-10	-9	-8	-7	-6	-5	-4	-3	-2	-1	+0	+1	+2	+3	+4	+5	+6	+7	+8	+9	+10
correlation	0.11	−0.72	0.30	0.30	−0.04	−0.32	0.19	−0.08	−0.31	0.09	0.57	−0.04	−0.18	−0.26	0.33	−0.12	0.12	0.02	0.22	−0.20	−0.13

Lag +k: today's change in TWSE foreign net buy against the change in KOSPI foreign net buy k readings later (positive = the first one leads). A peak away from 0 is a description of the past year only.