Fluid Controls

IDEX Corporation vs Xylem Inc. Common Stock New

WatchlistIEX / XYLPrices through Oct 22, 2026

Why these are rivals: #1 and #3 by market value ($24B vs $17B) in Nasdaq's "Fluid Controls" industry; SEC SIC 3561 / 3561 (same major group); #1 and #3 by market value ($24B vs $17B) with SEC SIC 3561 (Pumps & Pumping Equipment).

Rivals, but right now the price gap does not have a measured habit of closing, so there is no paper idea, whatever the gap.

Co-movement: daily return correlation, 252 sessions: 0.44 (needs >= 0.60)
Mean reversion: ADF t-statistic of the spread: -1.22 (needs <= -2.873 (5% critical value))
Speed: half-life of the spread, sessions: 128.65 (needs <= 63)

Business leadership

XYL is the larger business

Annual revenue reported to the SEC. Scale, not market share.

Year	IEX	XYL	Larger
2025	$3.5B	$9.0B	XYL
2024	$3.3B	$8.6B	XYL
2023	$3.3B	$7.4B	XYL
2022	$3.2B	$5.5B	XYL
2021	$2.8B	$5.2B	XYL
2020	$2.4B	$4.9B	XYL

XYL led in every year with figures for both. Market value: IEX $17.2B, XYL $24.2B.

Stock leadership

IEX is ahead now

Measured against the pair's own last 252 trading days.

IEX leads XYL by 1.04 standard deviations: +24.7% over its usual price ratio. 1 lead switch in the last year.

Price change	3 mo	6 mo	12 mo
IEX	+1.6%	+9.8%	+34.0%
XYL	-8.8%	-10.2%	-25.8%

Relationship

Not a measured twin today

Only these tests can make a pair tradable on paper.

Pass: Aligned sessions: 2521 (needs >= 254)
Fail: Co-movement: daily return correlation, 252 sessions: 0.44 (needs >= 0.60)
Fail: Mean reversion: ADF t-statistic of the spread: -1.22 (needs <= -2.873 (5% critical value))
Fail: Speed: half-life of the spread, sessions: 128.65 (needs <= 63)
Data: Both stocks current

The twins over two years

Prices side by side, and the gap between them

IEX IDEX Corporation XYL Xylem Inc. Common Stock NewPrice index, 100 = 2024-10-18. Tint = which stock is ahead of the pair's usual 1-year relationship (z beyond +/-0.5).

Spread z-score: IEX relative to XYL, against the 252 sessions before each day. Above 0: IEX ahead; below 0: XYL ahead. Lines at +/-2 (idea) and +/-4 (stop).

Data table (504 sessions)

Date	IEX index	XYL index	z	Ahead
2026-10-22	107.77	81.34	+1.04	IEX ahead
2026-10-21	111.83	79.18	+1.36	IEX ahead
2026-10-20	110.75	78.19	+1.38	IEX ahead
2026-10-19	111.08	77.08	+1.47	IEX ahead
2026-10-16	111.88	77.46	+1.49	IEX ahead
2026-10-15	112.30	76.96	+1.55	IEX ahead
2026-10-14	113.34	76.49	+1.63	IEX ahead
2026-10-13	112.66	76.34	+1.62	IEX ahead
2026-10-12	111.99	76.38	+1.61	IEX ahead
2026-10-09	111.29	76.47	+1.58	IEX ahead
2026-10-08	110.08	75.93	+1.58	IEX ahead
2026-10-07	110.63	75.80	+1.62	IEX ahead
2026-10-06	112.23	77.85	+1.57	IEX ahead
2026-10-05	111.76	76.25	+1.66	IEX ahead
2026-10-02	110.67	75.78	+1.66	IEX ahead
2026-10-01	109.18	75.10	+1.65	IEX ahead
2026-09-30	108.29	75.39	+1.61	IEX ahead
2026-09-29	109.45	75.14	+1.69	IEX ahead
2026-09-28	109.79	75.13	+1.72	IEX ahead
2026-09-25	109.29	76.41	+1.63	IEX ahead
2026-09-24	108.54	76.43	+1.61	IEX ahead
2026-09-23	109.09	80.88	+1.38	IEX ahead
2026-09-22	107.20	80.29	+1.34	IEX ahead
2026-09-21	105.70	79.84	+1.31	IEX ahead
2026-09-18	106.27	80.08	+1.33	IEX ahead
2026-09-17	105.40	80.11	+1.30	IEX ahead
2026-09-16	105.21	79.86	+1.32	IEX ahead
2026-09-15	105.85	80.03	+1.35	IEX ahead
2026-09-14	105.51	80.03	+1.34	IEX ahead
2026-09-11	106.50	79.63	+1.42	IEX ahead
2026-09-10	105.19	79.33	+1.39	IEX ahead
2026-09-09	106.92	80.14	+1.43	IEX ahead
2026-09-08	107.19	81.01	+1.41	IEX ahead
2026-09-04	106.27	78.69	+1.52	IEX ahead
2026-09-03	105.97	80.32	+1.42	IEX ahead
2026-09-02	106.69	79.47	+1.51	IEX ahead
2026-09-01	105.86	79.58	+1.48	IEX ahead
2026-08-31	108.60	81.98	+1.48	IEX ahead
2026-08-28	109.38	82.87	+1.47	IEX ahead
2026-08-27	111.14	83.87	+1.50	IEX ahead
2026-08-26	111.57	84.44	+1.50	IEX ahead
2026-08-25	109.38	83.99	+1.45	IEX ahead
2026-08-24	111.00	85.01	+1.47	IEX ahead
2026-08-21	111.33	84.44	+1.53	IEX ahead
2026-08-20	111.03	84.46	+1.53	IEX ahead
2026-08-19	111.36	86.52	+1.44	IEX ahead
2026-08-18	111.22	84.83	+1.54	IEX ahead
2026-08-17	114.18	87.46	+1.54	IEX ahead
2026-08-14	113.49	89.10	+1.43	IEX ahead
2026-08-13	113.58	89.58	+1.42	IEX ahead
2026-08-12	114.25	90.78	+1.40	IEX ahead
2026-08-11	112.72	91.71	+1.30	IEX ahead
2026-08-10	110.80	90.22	+1.30	IEX ahead
2026-08-07	111.37	89.58	+1.37	IEX ahead
2026-08-06	111.01	89.90	+1.35	IEX ahead
2026-08-05	112.56	91.01	+1.37	IEX ahead
2026-08-04	113.00	90.95	+1.40	IEX ahead
2026-08-03	110.53	88.65	+1.43	IEX ahead
2026-07-31	109.46	87.08	+1.48	IEX ahead
2026-07-30	111.04	86.97	+1.57	IEX ahead
2026-07-29	109.02	90.92	+1.28	IEX ahead
2026-07-28	106.71	93.04	+1.07	IEX ahead
2026-07-27	106.32	89.46	+1.26	IEX ahead
2026-07-24	106.05	89.15	+1.27	IEX ahead
2026-07-23	105.55	87.01	+1.38	IEX ahead
2026-07-22	106.00	86.47	+1.44	IEX ahead
2026-07-21	105.06	87.11	+1.37	IEX ahead
2026-07-20	105.09	89.80	+1.23	IEX ahead
2026-07-17	106.84	91.41	+1.23	IEX ahead
2026-07-16	108.75	93.28	+1.23	IEX ahead
2026-07-15	106.19	90.40	+1.28	IEX ahead
2026-07-14	105.80	90.49	+1.26	IEX ahead
2026-07-13	105.20	90.24	+1.26	IEX ahead
2026-07-10	105.52	90.25	+1.28	IEX ahead
2026-07-09	104.37	88.51	+1.34	IEX ahead
2026-07-08	103.73	88.31	+1.33	IEX ahead
2026-07-07	105.01	89.82	+1.31	IEX ahead
2026-07-06	106.62	88.91	+1.45	IEX ahead
2026-07-02	106.31	87.94	+1.51	IEX ahead
2026-07-01	106.85	87.31	+1.59	IEX ahead
2026-06-30	107.80	88.01	+1.61	IEX ahead
2026-06-29	107.33	86.90	+1.67	IEX ahead
2026-06-26	107.91	86.70	+1.72	IEX ahead
2026-06-25	108.33	87.11	+1.74	IEX ahead
2026-06-24	105.52	83.41	+1.85	IEX ahead
2026-06-23	105.05	82.19	+1.92	IEX ahead
2026-06-22	107.04	83.21	+1.98	IEX ahead
2026-06-18	106.84	82.95	+2.01	IEX ahead
2026-06-17	106.25	82.11	+2.06	IEX ahead
2026-06-16	106.31	83.41	+2.00	IEX ahead
2026-06-15	105.47	82.62	+2.03	IEX ahead
2026-06-12	103.78	81.95	+2.01	IEX ahead
2026-06-11	103.03	81.19	+2.05	IEX ahead
2026-06-10	101.89	79.76	+2.11	IEX ahead
2026-06-09	105.51	82.54	+2.14	IEX ahead
2026-06-08	103.83	81.54	+2.14	IEX ahead
2026-06-05	102.29	81.85	+2.06	IEX ahead
2026-06-04	102.74	82.03	+2.10	IEX ahead
2026-06-03	102.28	81.66	+2.12	IEX ahead
2026-06-02	100.76	82.11	+2.03	IEX ahead
2026-06-01	98.60	80.65	+2.03	IEX ahead
2026-05-29	100.14	81.55	+2.08	IEX ahead
2026-05-28	99.76	81.34	+2.09	IEX ahead
2026-05-27	100.58	81.97	+2.12	IEX ahead
2026-05-26	100.28	82.74	+2.07	IEX ahead
2026-05-22	99.17	82.10	+2.07	IEX ahead
2026-05-21	97.66	80.93	+2.09	IEX ahead
2026-05-20	98.89	80.57	+2.22	IEX ahead
2026-05-19	97.44	79.17	+2.27	IEX ahead
2026-05-18	99.10	80.63	+2.29	IEX ahead
2026-05-15	98.65	80.49	+2.30	IEX ahead
2026-05-14	100.41	81.48	+2.36	IEX ahead
2026-05-13	100.80	81.16	+2.45	IEX ahead
2026-05-12	101.58	83.04	+2.38	IEX ahead
2026-05-11	101.65	83.38	+2.38	IEX ahead
2026-05-08	103.04	84.67	+2.40	IEX ahead
2026-05-07	102.06	86.09	+2.25	IEX ahead
2026-05-06	103.64	88.29	+2.20	IEX ahead
2026-05-05	102.48	86.65	+2.28	IEX ahead
2026-05-04	101.80	85.50	+2.36	IEX ahead
2026-05-01	102.09	85.89	+2.38	IEX ahead
2026-04-30	103.48	87.97	+2.34	IEX ahead
2026-04-29	103.23	85.91	+2.53	IEX ahead
2026-04-28	97.54	87.78	+1.96	IEX ahead
2026-04-27	98.51	91.95	+1.70	IEX ahead
2026-04-24	97.25	90.43	+1.74	IEX ahead
2026-04-23	98.15	90.60	+1.81	IEX ahead
2026-04-22	96.72	90.43	+1.73	IEX ahead
2026-04-21	97.27	89.32	+1.88	IEX ahead
2026-04-20	98.02	89.68	+1.92	IEX ahead
2026-04-17	97.81	90.17	+1.88	IEX ahead
2026-04-16	95.34	93.22	+1.42	IEX ahead
2026-04-15	94.77	93.20	+1.38	IEX ahead
2026-04-14	97.33	96.53	+1.31	IEX ahead
2026-04-13	97.43	95.93	+1.37	IEX ahead
2026-04-10	95.52	95.83	+1.23	IEX ahead
2026-04-09	94.87	96.34	+1.13	IEX ahead
2026-04-08	93.98	95.27	+1.14	IEX ahead
2026-04-07	91.12	92.52	+1.13	IEX ahead
2026-04-06	90.61	92.21	+1.11	IEX ahead
2026-04-02	90.47	90.28	+1.27	IEX ahead
2026-04-01	91.19	91.19	+1.26	IEX ahead
2026-03-31	90.03	88.97	+1.35	IEX ahead
2026-03-30	87.16	86.49	+1.32	IEX ahead
2026-03-27	88.61	87.51	+1.36	IEX ahead
2026-03-26	90.12	88.96	+1.37	IEX ahead
2026-03-25	91.02	90.64	+1.31	IEX ahead
2026-03-24	91.62	89.67	+1.45	IEX ahead
2026-03-23	89.59	89.29	+1.31	IEX ahead
2026-03-20	87.45	89.67	+1.08	IEX ahead
2026-03-19	89.00	89.71	+1.22	IEX ahead
2026-03-18	90.32	89.06	+1.40	IEX ahead
2026-03-17	90.43	90.65	+1.27	IEX ahead
2026-03-16	90.04	90.14	+1.29	IEX ahead
2026-03-13	89.38	89.25	+1.31	IEX ahead
2026-03-12	89.35	89.35	+1.30	IEX ahead
2026-03-11	92.38	91.09	+1.42	IEX ahead
2026-03-10	93.00	91.36	+1.46	IEX ahead
2026-03-09	93.86	91.96	+1.49	IEX ahead
2026-03-06	94.00	91.68	+1.53	IEX ahead
2026-03-05	96.58	93.95	+1.56	IEX ahead
2026-03-04	99.13	96.34	+1.58	IEX ahead
2026-03-03	99.25	94.68	+1.74	IEX ahead
2026-03-02	100.48	96.02	+1.74	IEX ahead
2026-02-27	99.50	96.46	+1.63	IEX ahead
2026-02-26	99.55	98.22	+1.49	IEX ahead
2026-02-25	97.93	95.49	+1.59	IEX ahead
2026-02-24	99.01	95.39	+1.70	IEX ahead
2026-02-23	98.16	94.74	+1.69	IEX ahead
2026-02-20	98.55	95.79	+1.64	IEX ahead
2026-02-19	98.73	96.20	+1.62	IEX ahead
2026-02-18	99.26	96.22	+1.67	IEX ahead
2026-02-17	99.37	95.43	+1.76	IEX ahead
2026-02-13	99.94	95.36	+1.83	IEX ahead
2026-02-12	97.44	93.88	+1.76	IEX ahead
2026-02-11	100.45	94.38	+1.99	IEX ahead
2026-02-10	101.92	95.98	+1.98	IEX ahead
2026-02-09	100.10	104.37	+1.11	IEX ahead
2026-02-06	100.40	105.81	+1.01	IEX ahead
2026-02-05	101.14	103.66	+1.24	IEX ahead
2026-02-04	100.82	104.04	+1.16	IEX ahead
2026-02-03	95.76	103.16	+0.78	IEX ahead
2026-02-02	94.15	104.14	+0.55	IEX ahead
2026-01-30	94.31	102.64	+0.66	IEX ahead
2026-01-29	94.87	102.68	+0.69	IEX ahead
2026-01-28	93.29	100.89	+0.69	IEX ahead
2026-01-27	92.55	104.53	+0.33	near the usual relationship
2026-01-26	92.74	106.72	+0.17	near the usual relationship
2026-01-23	92.75	105.14	+0.28	near the usual relationship
2026-01-22	93.97	106.40	+0.27	near the usual relationship
2026-01-21	94.55	105.54	+0.37	near the usual relationship
2026-01-20	91.82	103.35	+0.30	near the usual relationship
2026-01-16	93.54	108.79	+0.04	near the usual relationship
2026-01-15	92.77	107.81	+0.04	near the usual relationship
2026-01-14	90.50	104.30	+0.09	near the usual relationship
2026-01-13	88.98	104.31	-0.04	near the usual relationship
2026-01-12	88.51	103.54	-0.03	near the usual relationship
2026-01-09	87.74	104.00	-0.13	near the usual relationship
2026-01-08	87.75	104.89	-0.20	near the usual relationship
2026-01-07	85.73	103.80	-0.30	near the usual relationship
2026-01-06	87.34	105.22	-0.27	near the usual relationship
2026-01-05	85.88	103.48	-0.28	near the usual relationship
2026-01-02	85.05	102.08	-0.26	near the usual relationship
2025-12-31	84.52	101.38	-0.26	near the usual relationship
2025-12-30	85.16	102.43	-0.28	near the usual relationship
2025-12-29	85.50	103.04	-0.30	near the usual relationship
2025-12-26	85.65	103.34	-0.32	near the usual relationship
2025-12-24	85.59	103.28	-0.33	near the usual relationship
2025-12-23	85.66	103.20	-0.32	near the usual relationship
2025-12-22	85.27	103.57	-0.38	near the usual relationship
2025-12-19	84.44	102.79	-0.40	near the usual relationship
2025-12-18	84.31	101.76	-0.35	near the usual relationship
2025-12-17	83.76	101.91	-0.41	near the usual relationship
2025-12-16	84.16	102.44	-0.42	near the usual relationship
2025-12-15	84.88	102.93	-0.40	near the usual relationship
2025-12-12	84.99	102.07	-0.35	near the usual relationship
2025-12-11	86.09	104.27	-0.41	near the usual relationship
2025-12-10	83.84	103.08	-0.51	XYL ahead
2025-12-09	82.41	101.96	-0.55	XYL ahead
2025-12-08	83.57	102.98	-0.53	XYL ahead
2025-12-05	84.33	103.49	-0.51	XYL ahead
2025-12-04	85.04	104.88	-0.55	XYL ahead
2025-12-03	84.65	104.89	-0.58	XYL ahead
2025-12-02	83.17	103.80	-0.63	XYL ahead
2025-12-01	82.95	103.79	-0.65	XYL ahead
2025-11-28	82.62	104.73	-0.74	XYL ahead
2025-11-26	82.53	105.06	-0.77	XYL ahead
2025-11-25	82.48	105.35	-0.80	XYL ahead
2025-11-24	80.71	105.59	-0.94	XYL ahead
2025-11-21	81.06	104.52	-0.87	XYL ahead
2025-11-20	77.42	102.77	-1.04	XYL ahead
2025-11-19	76.80	103.47	-1.14	XYL ahead
2025-11-18	76.80	104.35	-1.20	XYL ahead
2025-11-17	77.31	104.97	-1.20	XYL ahead
2025-11-14	78.13	106.26	-1.22	XYL ahead
2025-11-13	79.35	109.64	-1.32	XYL ahead
2025-11-12	80.54	111.58	-1.34	XYL ahead
2025-11-11	80.52	111.51	-1.35	XYL ahead
2025-11-10	80.18	112.46	-1.44	XYL ahead
2025-11-07	79.78	112.65	-1.49	XYL ahead
2025-11-06	79.24	111.93	-1.50	XYL ahead
2025-11-05	79.93	112.18	-1.48	XYL ahead
2025-11-04	79.73	111.44	-1.47	XYL ahead
2025-11-03	79.92	111.00	-1.44	XYL ahead
2025-10-31	81.44	112.31	-1.41	XYL ahead
2025-10-30	80.89	112.81	-1.49	XYL ahead
2025-10-29	82.36	113.87	-1.45	XYL ahead
2025-10-28	79.30	112.05	-1.60	XYL ahead
2025-10-27	79.61	111.23	-1.55	XYL ahead
2025-10-24	79.77	110.37	-1.50	XYL ahead
2025-10-23	79.97	109.95	-1.48	XYL ahead
2025-10-22	79.01	108.69	-1.49	XYL ahead
2025-10-21	80.43	109.58	-1.45	XYL ahead
2025-10-20	79.14	109.26	-1.54	XYL ahead
2025-10-17	79.00	108.63	-1.53	XYL ahead
2025-10-16	78.39	107.82	-1.55	XYL ahead
2025-10-15	77.51	108.52	-1.67	XYL ahead
2025-10-14	77.73	109.12	-1.71	XYL ahead
2025-10-13	76.40	108.70	-1.81	XYL ahead
2025-10-10	76.55	107.44	-1.74	XYL ahead
2025-10-09	78.78	109.30	-1.69	XYL ahead
2025-10-08	79.27	110.33	-1.73	XYL ahead
2025-10-07	78.75	110.28	-1.79	XYL ahead
2025-10-06	79.35	111.60	-1.83	XYL ahead
2025-10-03	79.32	111.56	-1.85	XYL ahead
2025-10-02	78.46	110.94	-1.91	XYL ahead
2025-10-01	77.95	110.10	-1.93	XYL ahead
2025-09-30	77.31	109.81	-1.99	XYL ahead
2025-09-29	77.04	107.17	-1.87	XYL ahead
2025-09-26	76.64	106.48	-1.88	XYL ahead
2025-09-25	75.66	105.31	-1.92	XYL ahead
2025-09-24	75.88	105.32	-1.92	XYL ahead
2025-09-23	75.71	106.54	-2.04	XYL ahead
2025-09-22	76.28	106.86	-2.03	XYL ahead
2025-09-19	76.49	106.37	-2.01	XYL ahead
2025-09-18	76.98	105.85	-1.95	XYL ahead
2025-09-17	75.80	104.97	-2.03	XYL ahead
2025-09-16	77.82	104.76	-1.85	XYL ahead
2025-09-15	76.55	105.52	-2.04	XYL ahead
2025-09-12	76.26	105.38	-2.08	XYL ahead
2025-09-11	78.13	105.57	-1.94	XYL ahead
2025-09-10	76.08	102.54	-1.95	XYL ahead
2025-09-09	76.95	102.40	-1.88	XYL ahead
2025-09-08	77.98	104.25	-1.93	XYL ahead
2025-09-05	78.34	104.65	-1.95	XYL ahead
2025-09-04	78.31	105.67	-2.05	XYL ahead
2025-09-03	76.63	104.01	-2.12	XYL ahead
2025-09-02	77.02	104.49	-2.14	XYL ahead
2025-08-29	78.14	105.39	-2.13	XYL ahead
2025-08-28	78.48	107.21	-2.25	XYL ahead
2025-08-27	78.89	107.67	-2.28	XYL ahead
2025-08-26	78.85	106.72	-2.24	XYL ahead
2025-08-25	78.84	106.22	-2.23	XYL ahead
2025-08-22	80.06	107.01	-2.20	XYL ahead
2025-08-21	77.13	104.39	-2.33	XYL ahead
2025-08-20	78.12	105.62	-2.36	XYL ahead
2025-08-19	78.80	105.59	-2.31	XYL ahead
2025-08-18	77.79	104.86	-2.40	XYL ahead
2025-08-15	78.26	104.83	-2.38	XYL ahead
2025-08-14	79.41	105.60	-2.35	XYL ahead
2025-08-13	80.51	106.86	-2.36	XYL ahead
2025-08-12	77.58	106.78	-2.73	XYL ahead
2025-08-11	74.83	106.37	-3.09	XYL ahead
2025-08-08	75.17	106.20	-3.10	XYL ahead
2025-08-07	75.30	106.82	-3.21	XYL ahead
2025-08-06	75.87	106.92	-3.22	XYL ahead
2025-08-05	76.87	106.92	-3.17	XYL ahead
2025-08-04	75.17	107.18	-3.51	XYL ahead
2025-08-01	75.58	105.85	-3.42	XYL ahead
2025-07-31	77.67	107.67	-3.39	XYL ahead
2025-07-30	78.03	97.23	-2.31	XYL ahead
2025-07-29	87.96	98.24	-1.16	XYL ahead
2025-07-28	87.60	98.47	-1.23	XYL ahead
2025-07-25	88.20	98.70	-1.18	XYL ahead
2025-07-24	87.24	97.71	-1.20	XYL ahead
2025-07-23	87.59	98.10	-1.20	XYL ahead
2025-07-22	87.65	97.57	-1.14	XYL ahead
2025-07-21	85.93	98.23	-1.44	XYL ahead
2025-07-18	87.10	98.80	-1.36	XYL ahead
2025-07-17	87.38	98.62	-1.31	XYL ahead
2025-07-16	85.39	97.10	-1.40	XYL ahead
2025-07-15	85.25	96.54	-1.36	XYL ahead
2025-07-14	85.91	97.51	-1.39	XYL ahead
2025-07-11	86.20	97.49	-1.36	XYL ahead
2025-07-10	88.07	97.97	-1.18	XYL ahead
2025-07-09	87.58	97.94	-1.25	XYL ahead
2025-07-08	86.67	97.83	-1.35	XYL ahead
2025-07-07	85.18	97.53	-1.52	XYL ahead
2025-07-03	86.09	98.48	-1.52	XYL ahead
2025-07-02	86.52	98.06	-1.42	XYL ahead
2025-07-01	85.59	97.53	-1.49	XYL ahead
2025-06-30	83.39	96.31	-1.65	XYL ahead
2025-06-27	83.75	95.47	-1.51	XYL ahead
2025-06-26	83.76	96.41	-1.63	XYL ahead
2025-06-25	82.89	94.92	-1.58	XYL ahead
2025-06-24	83.07	94.66	-1.53	XYL ahead
2025-06-23	82.04	93.43	-1.53	XYL ahead
2025-06-20	82.24	92.66	-1.41	XYL ahead
2025-06-18	83.14	93.16	-1.36	XYL ahead
2025-06-17	83.59	93.34	-1.32	XYL ahead
2025-06-16	85.46	94.99	-1.27	XYL ahead
2025-06-13	84.46	93.43	-1.22	XYL ahead
2025-06-12	86.69	94.77	-1.09	XYL ahead
2025-06-11	87.00	94.57	-1.02	XYL ahead
2025-06-10	87.52	95.66	-1.09	XYL ahead
2025-06-09	87.03	95.02	-1.08	XYL ahead
2025-06-06	87.07	94.31	-0.99	XYL ahead
2025-06-05	85.63	94.30	-1.19	XYL ahead
2025-06-04	85.92	94.35	-1.16	XYL ahead
2025-06-03	86.47	94.66	-1.12	XYL ahead
2025-06-02	85.10	93.58	-1.18	XYL ahead
2025-05-30	85.93	93.84	-1.10	XYL ahead
2025-05-29	86.51	93.55	-0.99	XYL ahead
2025-05-28	85.83	93.55	-1.09	XYL ahead
2025-05-27	87.14	93.98	-0.97	XYL ahead
2025-05-23	85.31	92.35	-1.01	XYL ahead
2025-05-22	86.04	93.26	-1.03	XYL ahead
2025-05-21	86.05	93.55	-1.07	XYL ahead
2025-05-20	89.42	94.56	-0.75	XYL ahead
2025-05-19	90.22	95.29	-0.74	XYL ahead
2025-05-16	90.65	95.32	-0.69	XYL ahead
2025-05-15	90.04	94.27	-0.65	XYL ahead
2025-05-14	89.52	93.40	-0.61	XYL ahead
2025-05-13	90.40	94.50	-0.63	XYL ahead
2025-05-12	90.86	94.74	-0.60	XYL ahead
2025-05-09	87.15	91.46	-0.68	XYL ahead
2025-05-08	87.71	91.80	-0.66	XYL ahead
2025-05-07	85.54	90.15	-0.74	XYL ahead
2025-05-06	85.28	89.67	-0.72	XYL ahead
2025-05-05	86.32	91.07	-0.77	XYL ahead
2025-05-02	86.19	92.50	-0.98	XYL ahead
2025-05-01	83.24	89.90	-1.06	XYL ahead
2025-04-30	82.63	89.76	-1.14	XYL ahead
2025-04-29	81.79	88.31	-1.07	XYL ahead
2025-04-28	82.70	86.30	-0.67	XYL ahead
2025-04-25	82.17	86.44	-0.77	XYL ahead
2025-04-24	82.55	86.07	-0.68	XYL ahead
2025-04-23	79.39	84.39	-0.91	XYL ahead
2025-04-22	79.04	83.16	-0.80	XYL ahead
2025-04-21	76.31	80.79	-0.88	XYL ahead
2025-04-17	77.87	82.21	-0.85	XYL ahead
2025-04-16	77.94	81.29	-0.72	XYL ahead
2025-04-15	79.49	81.25	-0.49	near the usual relationship
2025-04-14	80.68	81.67	-0.38	near the usual relationship
2025-04-11	80.04	81.19	-0.41	near the usual relationship
2025-04-10	79.31	80.17	-0.37	near the usual relationship
2025-04-09	82.55	82.27	-0.22	near the usual relationship
2025-04-08	76.92	76.58	-0.21	near the usual relationship
2025-04-07	77.39	77.20	-0.24	near the usual relationship
2025-04-04	77.18	77.87	-0.38	near the usual relationship
2025-04-03	80.12	82.63	-0.63	XYL ahead
2025-04-02	87.07	88.63	-0.49	near the usual relationship
2025-04-01	86.04	89.25	-0.70	XYL ahead
2025-03-31	85.96	88.94	-0.68	XYL ahead
2025-03-28	85.93	88.92	-0.69	XYL ahead
2025-03-27	87.37	90.84	-0.75	XYL ahead
2025-03-26	87.75	91.67	-0.80	XYL ahead
2025-03-25	87.57	91.64	-0.83	XYL ahead
2025-03-24	87.92	89.93	-0.59	XYL ahead
2025-03-21	86.41	88.20	-0.57	XYL ahead
2025-03-20	87.27	89.22	-0.60	XYL ahead
2025-03-19	87.67	90.31	-0.68	XYL ahead
2025-03-18	87.69	90.02	-0.65	XYL ahead
2025-03-17	87.68	91.63	-0.85	XYL ahead
2025-03-14	86.63	91.39	-0.95	XYL ahead
2025-03-13	84.66	90.08	-1.05	XYL ahead
2025-03-12	86.40	91.46	-1.01	XYL ahead
2025-03-11	87.76	92.04	-0.92	XYL ahead
2025-03-10	88.46	95.48	-1.22	XYL ahead
2025-03-07	89.14	97.25	-1.34	XYL ahead
2025-03-06	89.05	96.01	-1.23	XYL ahead
2025-03-05	89.50	96.54	-1.25	XYL ahead
2025-03-04	88.29	94.79	-1.21	XYL ahead
2025-03-03	89.55	96.62	-1.27	XYL ahead
2025-02-28	92.31	97.45	-1.05	XYL ahead
2025-02-27	92.02	95.88	-0.92	XYL ahead
2025-02-26	93.00	95.67	-0.80	XYL ahead
2025-02-25	93.31	95.34	-0.73	XYL ahead
2025-02-24	93.39	95.47	-0.74	XYL ahead
2025-02-21	91.66	94.80	-0.87	XYL ahead
2025-02-20	93.13	96.58	-0.91	XYL ahead
2025-02-19	94.36	96.98	-0.82	XYL ahead
2025-02-18	93.27	97.15	-0.96	XYL ahead
2025-02-14	92.72	96.32	-0.94	XYL ahead
2025-02-13	91.69	97.60	-1.20	XYL ahead
2025-02-12	91.93	96.72	-1.09	XYL ahead
2025-02-11	92.57	98.30	-1.20	XYL ahead
2025-02-10	93.31	97.72	-1.06	XYL ahead
2025-02-07	93.07	97.60	-1.09	XYL ahead
2025-02-06	94.68	97.84	-0.94	XYL ahead
2025-02-05	93.85	96.64	-0.91	XYL ahead
2025-02-04	103.86	96.22	+0.15	near the usual relationship
2025-02-03	103.96	91.42	+0.68	IEX ahead
2025-01-31	106.55	92.35	+0.82	IEX ahead
2025-01-30	106.45	90.67	+1.00	IEX ahead
2025-01-29	103.97	90.27	+0.80	IEX ahead
2025-01-28	105.05	90.34	+0.90	IEX ahead
2025-01-27	105.17	90.96	+0.84	IEX ahead
2025-01-24	104.48	90.51	+0.82	IEX ahead
2025-01-23	105.47	90.52	+0.92	IEX ahead
2025-01-22	104.49	90.56	+0.82	IEX ahead
2025-01-21	104.34	90.77	+0.78	IEX ahead
2025-01-17	102.45	89.09	+0.78	IEX ahead
2025-01-16	103.20	88.56	+0.91	IEX ahead
2025-01-15	101.90	86.43	+1.03	IEX ahead
2025-01-14	101.90	85.93	+1.08	IEX ahead
2025-01-13	99.76	86.09	+0.85	IEX ahead
2025-01-10	97.86	84.89	+0.80	IEX ahead
2025-01-08	99.17	86.29	+0.76	IEX ahead
2025-01-07	98.80	86.20	+0.73	IEX ahead
2025-01-06	99.43	86.99	+0.70	IEX ahead
2025-01-03	98.33	87.24	+0.56	IEX ahead
2025-01-02	97.88	86.32	+0.61	IEX ahead
2024-12-31	99.41	86.38	+0.76	IEX ahead
2024-12-30	99.19	86.57	+0.71	IEX ahead
2024-12-27	100.28	87.50	+0.71	IEX ahead
2024-12-26	101.16	88.20	+0.71	IEX ahead
2024-12-24	100.83	87.96	+0.70	IEX ahead
2024-12-23	100.11	87.49	+0.68	IEX ahead
2024-12-20	100.88	87.21	+0.78	IEX ahead
2024-12-19	99.87	86.68	+0.74	IEX ahead
2024-12-18	100.53	87.05	+0.76	IEX ahead
2024-12-17	105.54	89.91	+0.91	IEX ahead
2024-12-16	106.44	89.92	+0.99	IEX ahead
2024-12-13	105.92	89.79	+0.96	IEX ahead
2024-12-12	106.86	90.14	+1.00	IEX ahead
2024-12-11	108.38	91.86	+0.95	IEX ahead
2024-12-10	108.27	95.72	+0.54	IEX ahead
2024-12-09	109.08	96.30	+0.55	IEX ahead
2024-12-06	109.11	94.08	+0.77	IEX ahead
2024-12-05	108.51	93.98	+0.73	IEX ahead
2024-12-04	108.24	94.95	+0.60	IEX ahead
2024-12-03	109.49	95.06	+0.69	IEX ahead
2024-12-02	110.11	94.56	+0.79	IEX ahead
2024-11-29	109.55	94.36	+0.76	IEX ahead
2024-11-27	109.77	93.52	+0.86	IEX ahead
2024-11-26	110.21	92.72	+0.98	IEX ahead
2024-11-25	112.13	95.99	+0.81	IEX ahead
2024-11-22	110.44	94.45	+0.82	IEX ahead
2024-11-21	108.04	93.33	+0.72	IEX ahead
2024-11-20	105.98	91.44	+0.72	IEX ahead
2024-11-19	106.21	91.00	+0.79	IEX ahead
2024-11-18	107.66	91.17	+0.89	IEX ahead
2024-11-15	108.22	90.66	+0.98	IEX ahead
2024-11-14	108.96	90.55	+1.06	IEX ahead
2024-11-13	109.72	92.12	+0.96	IEX ahead
2024-11-12	108.28	92.91	+0.75	IEX ahead
2024-11-11	108.93	92.79	+0.82	IEX ahead
2024-11-08	108.54	92.59	+0.80	IEX ahead
2024-11-07	108.73	92.06	+0.86	IEX ahead
2024-11-06	111.58	92.12	+1.08	IEX ahead
2024-11-05	106.74	91.02	+0.78	IEX ahead
2024-11-04	104.02	89.96	+0.65	IEX ahead
2024-11-01	102.62	88.94	+0.63	IEX ahead
2024-10-31	101.95	90.66	+0.39	near the usual relationship
2024-10-30	103.85	96.95	-0.05	near the usual relationship
2024-10-29	96.84	96.70	-0.65	XYL ahead
2024-10-28	97.30	97.37	-0.68	XYL ahead
2024-10-25	96.34	97.10	-0.75	XYL ahead
2024-10-24	96.65	97.27	-0.74	XYL ahead
2024-10-23	97.31	98.06	-0.76	XYL ahead
2024-10-22	98.75	97.80	-0.62	XYL ahead
2024-10-21	99.41	98.66	-0.64	XYL ahead
2024-10-18	100.00	100.00	-0.71	XYL ahead

One-day company-specific moves (4+ standard deviations, which block ideas for 10 sessions): Feb 5, 2025 (IEX -9.6%, XYL +0.4%); Jul 30, 2025 (IEX -11.3%, XYL -1.0%); Jul 31, 2025 (IEX -0.5%, XYL +10.7%); Feb 10, 2026 (IEX +1.8%, XYL -8.0%); Apr 29, 2026 (IEX +5.8%, XYL -2.1%); Oct 22, 2026 (IEX -3.6%, XYL +2.7%). Upcoming earnings: XYL Oct 27, 2026 (pre-market); IEX Oct 28, 2026 (pre-market).

Paired trades

The shared paper book and the replay, kept apart

Forward paper record

No paper position on this pair yet.

Historical simulation (a diagnostic, same rules)

2 simulated trades to Oct 20, 2026: +6.28% per trade on average after costs, 2 won.

Legs	Entered	Exited	Why	Days	Before costs	Costs + borrow	After costs
Long XYL · Short IEX	Jul 31, 2019	Oct 23, 2019	converged	84	$618.00	-$94.19	$522.99 (+5.23%)
Long XYL · Short IEX	Jun 20, 2018	Sep 11, 2018	converged	83	$833.64	-$99.82	$733.04 (+7.33%)

Per $10,000 a leg. A replay on today's companies cannot prove an edge.

The companies

IEX and XYL at a glance

IEX IDEX Corporation

Listing: NYSE · SEC CIK 832101
Industry: Fluid Controls · SIC 3561 Pumps & Pumping Equipment
Market value: $17.2B
Price history: 2,521 daily closes, Oct 12, 2016 to Oct 22, 2026

XYL Xylem Inc. Common Stock New

Listing: NYSE · SEC CIK 1524472
Industry: Fluid Controls · SIC 3561 Pumps & Pumping Equipment
Market value: $24.2B
Price history: 2,521 daily closes, Oct 12, 2016 to Oct 22, 2026

Daily prices: Nasdaq.com. Filings and industry codes: SEC EDGAR. Earnings dates: Nasdaq earnings calendar.

All pairs →

Pair	Status	Ahead now	Industry
ITT / IEX	Watchlist	IEX by 1.70 sd	Fluid Controls
XYL / ITT	Watchlist	ITT by 0.55 sd	Fluid Controls

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Paper only: hypothetical paired positions with modelled costs. No broker, no orders, no real money. A historical simulation is a diagnostic, not proof of an edge. Not investment advice.