Ciena: what the price is pricing in

The price implies cash-flow growth of 35.7% a year; our model expects 13.0%. That gap is wide enough for a short position this quarter. Switch lens below to see the same question asked of earnings, growth, sales and book value.

What growth in cash flow is the price paying for?

The price implies cash-flow growth of 35.7% a year; our model expects 13.0%.

Market more optimistic than our model: short this quarter

What the price implies What our model expects

Quarters with a position200 long, 20 short, since December 31, 2014

Beat the S&P 50012 of 2060.0% of quarters held

Strategy against the index−96.0%cumulative; worst fall -98.4%

$10,000 became$1,847S&P 500 bought and held: $42,466

Over time

The growth in owner earnings (free cash flow after stock-based pay) that would justify the share price in our discounted-cash-flow model, against the growth the model itself assumes from the company's record.

Growth our model assumes Growth the price implies Long quarter Short quarter. Lower panel: the share price at each quarter end, adjusted for later share splits and spin-offs (the table below gives the price as traded).

$10,000 trading the gap vs the S&P 500

StrategyS&P 500, buy and hold Hypothetical, before costs. The strategy holds the S&P 500 and only changes on a signal: it switches into CIEN in long quarters and adds a short of CIEN in short quarters. The gap between the lines is what the signal added or lost.

Skill or luck?

In plain English: Across 20 quarters with a position, this lens beat the S&P 500 in 12, by −8.1% a quarter on average. That could easily be chance. One company is a small sample: the results across all companies are the better guide.

Positions	Quarters	Beat the S&P 500	Average vs S&P 500, a quarter	Typical (median), a quarter	A year	Confidence (t)	Evidence
Longs	0	—	—	—	—	—	—
Shorts	20	60.0%	−8.1%	+3.7%	−47.5%	-1.20	No reliable evidence
All positions	20	60.0%	−8.1%	+3.7%	−47.5%	-1.20	No reliable evidence

Each position is measured against the S&P 500 over the same quarter: a long earns the stock's return minus the index's, a short the index's minus the stock's. "A year" compounds the per-quarter results. Evidence: strong at a t-statistic of 2 or more, some from 1.5; "worse" when the result is that far below zero; one company's history is a small sample, so read these alongside the results across all companies.

Every quarter (46)

From	Price paid	Growth the price implies	Growth our model assumes	Position	CIEN	S&P 500
September 30, 2026 (open)	$351.82	35.7%	13.0%	Short	−19.0%	−0.8%
June 30, 2026	$490.56	43.2%	12.2%	Short	−28.3%	+2.4%
March 31, 2026	$388.23	47.9%	14.2%	Short	+26.4%	+15.1%
December 31, 2025	$233.87	48.7%	10.0%	Short	+66.0%	−4.4%
September 30, 2025	$145.67	65.8%	3.3%	Short	+60.5%	+2.7%
June 30, 2025	$81.33	58.3%	2.0%	Short	+79.1%	+8.1%
September 30, 2024	$61.59	42.2%	4.9%	Short	+37.7%	+2.5%
June 30, 2024	$48.18	24.1%	10.9%	Short	+27.8%	+5.8%
March 31, 2024	$49.45	56.1%	14.1%	Short	−2.6%	+4.4%
December 31, 2023	$45.01	54.8%	9.5%	Short	+9.9%	+10.4%
September 30, 2023	$47.26	31.0%	4.3%	Short	−4.8%	+11.6%
June 30, 2023	$42.49	44.1%	2.8%	Short	+11.2%	−3.2%
March 31, 2023	$52.52	22.5%	2.0%	Short	−19.1%	+8.7%
December 31, 2022	$50.98	12.9%	5.3%	No position	+3.0%	+7.5%
September 30, 2022	$40.43	1.3%	8.5%	No position	+26.1%	+7.6%
June 30, 2022	$45.70	4.1%	6.0%	No position	−11.5%	−4.9%
March 31, 2022	$60.63	7.9%	3.9%	No position	−24.6%	−16.1%
December 31, 2021	$76.97	17.0%	2.0%	Short	−21.2%	−4.6%
September 30, 2021	$51.35	8.5%	2.0%	No position	+49.9%	+11.1%
June 30, 2021	$56.89	13.4%	2.0%	Short	−9.7%	+0.6%
March 31, 2021	$54.72	10.9%	3.5%	No position	+4.0%	+8.4%
December 31, 2020	$52.85	10.3%	7.3%	No position	+3.5%	+6.3%
September 30, 2020	$39.69	7.6%	9.6%	No position	+33.2%	+12.1%
June 30, 2020	$54.16	14.3%	11.7%	No position	−26.7%	+9.0%
March 31, 2020	$39.81	10.5%	13.3%	No position	+36.0%	+20.2%
December 31, 2019	$42.69	15.2%	15.0%	No position	−6.8%	−19.4%
September 30, 2019	$39.23	14.5%	14.1%	No position	+8.8%	+9.0%
June 30, 2019	$41.13	17.1%	11.6%	No position	−4.6%	+1.8%
March 31, 2019	$37.34	15.4%	9.3%	No position	+10.2%	+4.2%
December 31, 2018	$33.91	14.1%	6.9%	No position	+10.1%	+13.5%
September 30, 2018	$31.24	10.3%	5.8%	No position	+8.6%	−13.5%
June 30, 2018	$26.51	6.8%	7.0%	No position	+17.8%	+7.7%
March 31, 2018	$25.90	12.1%	7.4%	No position	+2.4%	+3.5%
December 31, 2017	$20.93	8.2%	7.2%	No position	+23.8%	−1.0%
September 30, 2017	$21.97	8.5%	7.6%	No position	−4.7%	+6.8%
June 30, 2017	$25.02	10.5%	6.7%	No position	−12.2%	+4.4%
March 31, 2017	$23.61	11.2%	7.0%	No position	+6.0%	+3.1%
December 31, 2016	$24.41	20.1%	9.7%	Short	−3.3%	+5.9%
September 30, 2016	$21.80	16.6%	8.3%	No position	+12.0%	+4.0%
June 30, 2016	$18.75	13.5%	9.5%	No position	+16.3%	+3.8%
March 31, 2016	$19.02	13.3%	8.5%	No position	−1.4%	+2.5%
December 31, 2015	$20.69	23.4%	5.8%	Short	−8.1%	+1.3%
September 30, 2015	$20.72	39.1%	7.7%	Short	−0.1%	+7.0%
June 30, 2015	$23.68	33.5%	7.7%	Short	−12.5%	−6.4%
March 31, 2015	$19.31	29.5%	9.7%	Short	+22.6%	+0.2%
December 31, 2014	$19.41	41.7%	13.1%	Short	−0.5%	+0.9%

Price paid: the closing price that day as traded, before any later share split.

What growth in earnings is the price paying for?

The price implies earnings growth of 38.0% a year; our model expects 13.0%.

Market more optimistic than our model: short this quarter

What the price implies What our model expects

Quarters with a position196 long, 13 short, since March 31, 2016

Beat the S&P 5008 of 1942.1% of quarters held

Strategy against the index−95.7%cumulative; worst fall -98.0%

$10,000 became$2,090S&P 500 bought and held: $42,121

Over time

The earnings growth the price-to-earnings ratio requires, against the growth our model assumes. Net income is already after interest, so it is valued at the return shareholders require, plus spare cash (none for banks and insurers, whose cash is funded by deposits and policies), with no debt subtracted.

Growth our model assumes Growth the P/E implies Long quarter Short quarter. Lower panel: the share price at each quarter end, adjusted for later share splits and spin-offs (the table below gives the price as traded).

$10,000 trading the gap vs the S&P 500

Skill or luck?

In plain English: Across 19 quarters with a position, this lens beat the S&P 500 in 8, by −8.1% a quarter on average. That could easily be chance. One company is a small sample: the results across all companies are the better guide.

Positions	Quarters	Beat the S&P 500	Average vs S&P 500, a quarter	Typical (median), a quarter	A year	Confidence (t)	Evidence
Longs	6	50.0%	+6.6%	+4.5%	+26.4%	1.34	Too few quarters
Shorts	13	38.5%	−14.9%	−11.2%	−66.0%	-1.52	Some evidence: worse
All positions	19	42.1%	−8.1%	−3.4%	−48.5%	-1.13	No reliable evidence

Every quarter (42)

From	Price paid	Growth the P/E implies	Growth our model assumes	Position	CIEN	S&P 500
September 30, 2026 (open)	$351.82	38.0%	13.0%	Short	−19.0%	−0.8%
June 30, 2026	$490.56	59.1%	12.2%	Short	−28.3%	+2.4%
March 31, 2026	$388.23	67.8%	14.2%	Short	+26.4%	+15.1%
December 31, 2025	$233.87	52.8%	10.0%	Short	+66.0%	−4.4%
September 30, 2025	$145.67	48.5%	3.3%	Short	+60.5%	+2.7%
June 30, 2025	$81.33	41.4%	2.0%	Short	+79.1%	+8.1%
March 31, 2025	$60.43	33.5%	2.0%	Short	+34.6%	+10.8%
December 31, 2024	$84.81	31.2%	2.0%	Short	−28.8%	−4.3%
September 30, 2024	$61.59	21.8%	4.9%	Short	+37.7%	+2.5%
June 30, 2024	$48.18	9.0%	10.9%	No position	+27.8%	+5.8%
March 31, 2024	$49.45	8.7%	14.1%	No position	−2.6%	+4.4%
December 31, 2023	$45.01	9.1%	9.5%	No position	+9.9%	+10.4%
September 30, 2023	$47.26	11.6%	4.3%	No position	−4.8%	+11.6%
June 30, 2023	$42.49	11.4%	2.8%	No position	+11.2%	−3.2%
March 31, 2023	$52.52	19.3%	2.0%	Short	−19.1%	+8.7%
December 31, 2022	$50.98	14.0%	5.3%	No position	+3.0%	+7.5%
September 30, 2022	$40.43	-5.2%	8.5%	Long	+26.1%	+7.6%
June 30, 2022	$45.70	-4.6%	6.0%	Long	−11.5%	−4.9%
March 31, 2022	$60.63	1.1%	3.9%	No position	−24.6%	−16.1%
December 31, 2021	$76.97	7.8%	2.0%	No position	−21.2%	−4.6%
September 30, 2021	$51.35	3.7%	2.0%	No position	+49.9%	+11.1%
June 30, 2021	$56.89	6.8%	2.0%	No position	−9.7%	+0.6%
March 31, 2021	$54.72	5.5%	3.5%	No position	+4.0%	+8.4%
December 31, 2020	$52.85	4.2%	7.3%	No position	+3.5%	+6.3%
September 30, 2020	$39.69	1.5%	9.6%	No position	+33.2%	+12.1%
June 30, 2020	$54.16	10.5%	11.7%	No position	−26.7%	+9.0%
March 31, 2020	$39.81	6.7%	13.3%	No position	+36.0%	+20.2%
December 31, 2019	$42.69	9.4%	15.0%	No position	−6.8%	−19.4%
September 30, 2019	$39.23	10.8%	14.1%	No position	+8.8%	+9.0%
June 30, 2019	$41.13	15.4%	11.6%	No position	−4.6%	+1.8%
December 31, 2018	$33.91	-15.5%	6.9%	Long	+10.1%	+13.5%
September 30, 2018	$31.24	-19.0%	5.8%	Long	+8.6%	−13.5%
June 30, 2018	$26.51	-23.8%	7.0%	Long	+17.8%	+7.7%
March 31, 2018	$25.90	-25.3%	7.4%	Long	+2.4%	+3.5%
December 31, 2017	$20.93	5.5%	7.2%	No position	+23.8%	−1.0%
September 30, 2017	$21.97	8.7%	7.6%	No position	−4.7%	+6.8%
June 30, 2017	$25.02	12.3%	6.7%	No position	−12.2%	+4.4%
March 31, 2017	$23.61	16.2%	7.0%	No position	+6.0%	+3.1%
December 31, 2016	$24.41	41.3%	9.7%	Short	−3.3%	+5.9%
September 30, 2016	$21.80	44.4%	8.3%	Short	+12.0%	+4.0%
June 30, 2016	$18.75	33.1%	9.5%	Short	+16.3%	+3.8%
March 31, 2016	$19.02	35.7%	8.5%	Short	−1.4%	+2.5%

Price paid: the closing price that day as traded, before any later share split.

Is the price-to-earnings ratio cheap or dear for the growth delivered?

Ciena trades on 117.5 times earnings while its earnings per share grew 30.7% a year: a PEG of 3.82.

Market more optimistic than our model: short this quarter

PEG: under 0.75 cheap for the growth, over 3 expensive

Quarters with a position109 long, 1 short, since June 30, 2019

Beat the S&P 5005 of 1050.0% of quarters held

Strategy against the index+33.5%cumulative; worst fall -35.8%

$10,000 became$19,744S&P 500 bought and held: $14,610

Over time

The P/E divided by the earnings-per-share growth delivered over three years. Under 0.75 the market pays little for the growth (long); over 3 it pays a lot (short).

EPS growth, 3 years (%) Price-to-earnings ratio (x) Long quarter Short quarter. Lower panel: the share price at each quarter end, adjusted for later share splits and spin-offs (the table below gives the price as traded).

$10,000 trading the gap vs the S&P 500

Skill or luck?

In plain English: Across 10 quarters with a position, this lens beat the S&P 500 in 5, by +4.7% a quarter on average. That could easily be chance. One company is a small sample: the results across all companies are the better guide.

Positions	Quarters	Beat the S&P 500	Average vs S&P 500, a quarter	Typical (median), a quarter	A year	Confidence (t)	Evidence
Longs	9	44.4%	+1.8%	−0.2%	+0.9%	0.31	No reliable evidence
Shorts	1	100.0%	+30.7%	+30.7%	+191.5%	—	Too few quarters
All positions	10	50.0%	+4.7%	+6.3%	+12.2%	0.78	No reliable evidence

Every quarter (11)

From	Price paid	Price-to-earnings ratio (x)	EPS growth, 3 years (%)	Position	CIEN	S&P 500
September 30, 2026 (open)	$351.82	117.5x	30.7%	Short	−19.0%	−0.8%
June 30, 2026	$490.56	312.3x	9.0%	Short	−28.3%	+2.4%
September 30, 2022	$40.43	14.5x	26.9%	Long	+26.1%	+7.6%
June 30, 2022	$45.70	14.5x	41.7%	Long	−11.5%	−4.9%
December 31, 2020	$52.85	21.9x	40.6%	Long	+3.5%	+6.3%
September 30, 2020	$39.69	19.2x	42.8%	Long	+33.2%	+12.1%
June 30, 2020	$54.16	29.9x	45.9%	Long	−26.7%	+9.0%
March 31, 2020	$39.81	24.6x	49.5%	Long	+36.0%	+20.2%
December 31, 2019	$42.69	28.4x	115.2%	Long	−6.8%	−19.4%
September 30, 2019	$39.23	30.9x	142.5%	Long	+8.8%	+9.0%
June 30, 2019	$41.13	40.1x	95.1%	Long	−4.6%	+1.8%

Price paid: the closing price that day as traded, before any later share split.

What profit margin is the price paying for?

The price implies an owner-earnings margin of 30.1%; the company has kept 9.1%.

Market more optimistic than our model: short this quarter

What the price implies What the company delivered

Quarters with a position260 long, 26 short, since September 30, 2011

Beat the S&P 50014 of 2653.8% of quarters held

Strategy against the index−96.1%cumulative; worst fall -98.0%

$10,000 became$3,881S&P 500 bought and held: $87,527

Over time

The owner-earnings margin (free cash flow after stock pay, as a share of revenue) the price requires at our model's growth, against the margin the company has delivered over three years.

Margin delivered Margin the price implies Long quarter Short quarter. Lower panel: the share price at each quarter end, adjusted for later share splits and spin-offs (the table below gives the price as traded).

$10,000 trading the gap vs the S&P 500

Skill or luck?

In plain English: Across 26 quarters with a position, this lens beat the S&P 500 in 14, by −5.7% a quarter on average. That could easily be chance. One company is a small sample: the results across all companies are the better guide.

Positions	Quarters	Beat the S&P 500	Average vs S&P 500, a quarter	Typical (median), a quarter	A year	Confidence (t)	Evidence
Longs	0	—	—	—	—	—	—
Shorts	26	53.8%	−5.7%	+2.1%	−39.3%	-1.02	No reliable evidence
All positions	26	53.8%	−5.7%	+2.1%	−39.3%	-1.02	No reliable evidence

Every quarter (61)

From	Price paid	Margin the price implies	Margin delivered	Position	CIEN	S&P 500
September 30, 2026 (open)	$351.82	30.1%	9.1%	Short	−19.0%	−0.8%
June 30, 2026	$490.56	47.5%	9.5%	Short	−28.3%	+2.4%
March 31, 2026	$388.23	36.1%	6.5%	Short	+26.4%	+15.1%
December 31, 2025	$233.87	28.6%	3.9%	Short	+66.0%	−4.4%
September 30, 2025	$145.67	28.1%	1.2%	Short	+60.5%	+2.7%
June 30, 2025	$81.33	18.1%	1.0%	Short	+79.1%	+8.1%
March 31, 2025	$60.43	13.8%	-0.2%	Short	+34.6%	+10.8%
December 31, 2024	$84.81	19.1%	-0.4%	Short	−28.8%	−4.3%
September 30, 2024	$61.59	11.3%	1.6%	Short	+37.7%	+2.5%
June 30, 2024	$48.18	6.0%	2.9%	No position	+27.8%	+5.8%
March 31, 2024	$49.45	5.4%	0.7%	No position	−2.6%	+4.4%
December 31, 2023	$45.01	6.5%	0.7%	Short	+9.9%	+10.4%
September 30, 2023	$47.26	9.6%	2.3%	Short	−4.8%	+11.6%
June 30, 2023	$42.49	10.1%	1.1%	Short	+11.2%	−3.2%
March 31, 2023	$52.52	12.9%	4.1%	Short	−19.1%	+8.7%
December 31, 2022	$50.98	10.2%	6.7%	No position	+3.0%	+7.5%
September 30, 2022	$40.43	6.2%	9.4%	No position	+26.1%	+7.6%
June 30, 2022	$45.70	8.5%	9.5%	No position	−11.5%	−4.9%
March 31, 2022	$60.63	12.8%	10.2%	No position	−24.6%	−16.1%
December 31, 2021	$76.97	20.0%	8.6%	Short	−21.2%	−4.6%
September 30, 2021	$51.35	13.1%	9.1%	No position	+49.9%	+11.1%
June 30, 2021	$56.89	14.7%	7.7%	Short	−9.7%	+0.6%
March 31, 2021	$54.72	12.6%	8.2%	No position	+4.0%	+8.4%
December 31, 2020	$52.85	9.4%	8.0%	No position	+3.5%	+6.3%
September 30, 2020	$39.69	6.3%	7.0%	No position	+33.2%	+12.1%
June 30, 2020	$54.16	7.9%	6.9%	No position	−26.7%	+9.0%
March 31, 2020	$39.81	5.5%	6.4%	No position	+36.0%	+20.2%
December 31, 2019	$42.69	5.5%	5.5%	No position	−6.8%	−19.4%
September 30, 2019	$39.23	5.6%	5.5%	No position	+8.8%	+9.0%
June 30, 2019	$41.13	6.9%	5.1%	No position	−4.6%	+1.8%
March 31, 2019	$37.34	7.7%	5.5%	No position	+10.2%	+4.2%
December 31, 2018	$33.91	8.4%	5.6%	No position	+10.1%	+13.5%
September 30, 2018	$31.24	7.9%	6.1%	No position	+8.6%	−13.5%
June 30, 2018	$26.51	6.1%	6.2%	No position	+17.8%	+7.7%
March 31, 2018	$25.90	8.2%	6.3%	No position	+2.4%	+3.5%
December 31, 2017	$20.93	6.0%	5.7%	No position	+23.8%	−1.0%
September 30, 2017	$21.97	6.2%	5.9%	No position	−4.7%	+6.8%
June 30, 2017	$25.02	6.7%	5.4%	No position	−12.2%	+4.4%
March 31, 2017	$23.61	6.8%	5.4%	No position	+6.0%	+3.1%
December 31, 2016	$24.41	6.8%	3.8%	No position	−3.3%	+5.9%
September 30, 2016	$21.80	5.7%	3.6%	No position	+12.0%	+4.0%
June 30, 2016	$18.75	4.7%	3.7%	No position	+16.3%	+3.8%
March 31, 2016	$19.02	4.2%	3.2%	No position	−1.4%	+2.5%
December 31, 2015	$20.69	6.6%	2.5%	No position	−8.1%	+1.3%
September 30, 2015	$20.72	5.9%	1.1%	No position	−0.1%	+7.0%
June 30, 2015	$23.68	6.2%	1.6%	No position	−12.5%	−6.4%
March 31, 2015	$19.31	4.3%	1.5%	No position	+22.6%	+0.2%
December 31, 2014	$19.41	4.1%	0.9%	No position	−0.5%	+0.9%
September 30, 2014	$16.72	3.7%	-0.2%	No position	+16.1%	+4.9%
June 30, 2014	$21.66	4.2%	-1.2%	Short	−22.8%	+1.1%
March 31, 2014	$22.74	4.0%	-1.7%	Short	−4.8%	+5.2%
December 31, 2013	$23.93	5.8%	-2.4%	Short	−5.0%	+1.7%
September 30, 2013	$25.01	5.6%	-5.9%	Short	−4.3%	+10.5%
June 30, 2013	$19.43	6.2%	-8.7%	Short	+28.7%	+5.2%
March 31, 2013	$16.01	6.4%	-8.2%	Short	+21.4%	+2.9%
December 31, 2012	$15.70	5.8%	-8.9%	Short	+2.0%	+10.5%
September 30, 2012	$13.59	5.3%	-13.6%	Short	+15.5%	−0.4%
June 30, 2012	$16.37	4.0%	-16.4%	Short	−17.0%	+6.3%
March 31, 2012	$16.19	4.6%	-18.9%	Short	+1.1%	−2.8%
December 31, 2011	$12.10	4.0%	-21.4%	Short	+33.8%	+12.7%
September 30, 2011	$11.20	3.9%	-23.9%	Short	+8.0%	+11.6%

Price paid: the closing price that day as traded, before any later share split.

What return on equity is the price paying for?

The price implies a return on equity of 109.3%; the company earned 15.5%.

Market more optimistic than our model: short this quarter

What the price implies What the company delivered

Quarters with a position394 long, 35 short, since September 30, 2015

Beat the S&P 50022 of 3956.4% of quarters held

Strategy against the index−96.6%cumulative; worst fall -98.5%

$10,000 became$1,815S&P 500 bought and held: $45,677

Over time

The return on equity that justifies the price-to-book ratio, (P/B)(r − g) + g with an 8.5% required return and 2.5% long-run growth, against the return the company delivered last year.

Return on equity delivered Return on equity the price implies Long quarter Short quarter. Lower panel: the share price at each quarter end, adjusted for later share splits and spin-offs (the table below gives the price as traded).

$10,000 trading the gap vs the S&P 500

Skill or luck?

In plain English: Across 39 quarters with a position, this lens beat the S&P 500 in 22, by −3.8% a quarter on average. That could easily be chance. One company is a small sample: the results across all companies are the better guide.

Positions	Quarters	Beat the S&P 500	Average vs S&P 500, a quarter	Typical (median), a quarter	A year	Confidence (t)	Evidence
Longs	4	50.0%	+6.9%	+4.5%	+28.4%	1.18	Too few quarters
Shorts	35	57.1%	−5.0%	+2.8%	−34.0%	-1.15	No reliable evidence
All positions	39	56.4%	−3.8%	+2.8%	−29.4%	-0.95	No reliable evidence

Every quarter (44)

From	Price paid	Return on equity the price implies	Return on equity delivered	Position	CIEN	S&P 500
September 30, 2026 (open)	$351.82	109.3%	15.5%	Short	−19.0%	−0.8%
June 30, 2026	$490.56	156.2%	8.2%	Short	−28.3%	+2.4%
March 31, 2026	$388.23	126.7%	4.5%	Short	+26.4%	+15.1%
December 31, 2025	$233.87	75.3%	5.0%	Short	+66.0%	−4.4%
September 30, 2025	$145.67	48.1%	3.7%	Short	+60.5%	+2.7%
June 30, 2025	$81.33	28.0%	2.8%	Short	+79.1%	+8.1%
March 31, 2025	$60.43	21.5%	3.0%	Short	+34.6%	+10.8%
December 31, 2024	$84.81	28.1%	4.7%	Short	−28.8%	−4.3%
September 30, 2024	$61.59	21.1%	5.3%	Short	+37.7%	+2.5%
June 30, 2024	$48.18	16.9%	7.9%	Short	+27.8%	+5.8%
March 31, 2024	$49.45	17.9%	9.2%	Short	−2.6%	+4.4%
December 31, 2023	$45.01	16.2%	7.9%	Short	+9.9%	+10.4%
September 30, 2023	$47.26	17.1%	7.1%	Short	−4.8%	+11.6%
June 30, 2023	$42.49	15.9%	6.5%	Short	+11.2%	−3.2%
March 31, 2023	$52.52	19.8%	5.3%	Short	−19.1%	+8.7%
December 31, 2022	$50.98	19.8%	7.1%	Short	+3.0%	+7.5%
September 30, 2022	$40.43	15.9%	15.6%	No position	+26.1%	+7.6%
June 30, 2022	$45.70	17.7%	18.2%	No position	−11.5%	−4.9%
March 31, 2022	$60.63	21.4%	18.1%	No position	−24.6%	−16.1%
December 31, 2021	$76.97	27.3%	17.3%	Short	−21.2%	−4.6%
September 30, 2021	$51.35	20.4%	14.8%	Short	+49.9%	+11.1%
June 30, 2021	$56.89	23.2%	14.8%	Short	−9.7%	+0.6%
March 31, 2021	$54.72	23.0%	15.4%	Short	+4.0%	+8.4%
December 31, 2020	$52.85	22.9%	16.6%	Short	+3.5%	+6.3%
September 30, 2020	$39.69	19.0%	14.9%	No position	+33.2%	+12.1%
June 30, 2020	$54.16	25.6%	13.3%	Short	−26.7%	+9.0%
March 31, 2020	$39.81	19.7%	12.4%	Short	+36.0%	+20.2%
December 31, 2019	$42.69	21.5%	12.2%	Short	−6.8%	−19.4%
September 30, 2019	$39.23	20.6%	10.6%	Short	+8.8%	+9.0%
June 30, 2019	$41.13	21.5%	8.5%	Short	−4.6%	+1.8%
December 31, 2018	$33.91	20.8%	55.2%	Long	+10.1%	+13.5%
September 30, 2018	$31.24	18.4%	58.7%	Long	+8.6%	−13.5%
June 30, 2018	$26.51	15.5%	61.4%	Long	+17.8%	+7.7%
March 31, 2018	$25.90	17.1%	87.0%	Long	+2.4%	+3.5%
December 31, 2017	$20.93	25.4%	16.6%	Short	+23.8%	−1.0%
September 30, 2017	$21.97	28.2%	14.8%	Short	−4.7%	+6.8%
June 30, 2017	$25.02	29.2%	12.3%	Short	−12.2%	+4.4%
March 31, 2017	$23.61	31.7%	10.5%	Short	+6.0%	+3.1%
December 31, 2016	$24.41	36.9%	4.9%	Short	−3.3%	+5.9%
September 30, 2016	$21.80	29.6%	3.0%	Short	+12.0%	+4.0%
June 30, 2016	$18.75	27.0%	3.0%	Short	+16.3%	+3.8%
March 31, 2016	$19.02	23.0%	1.9%	Short	−1.4%	+2.5%
December 31, 2015	$20.69	95.5%	-2.9%	Short	−8.1%	+1.3%
September 30, 2015	$20.72	117.3%	-9.1%	Short	−0.1%	+7.0%

Price paid: the closing price that day as traded, before any later share split.

How the test works

At each quarter end since March 2010 we rebuild the models from Ciena's quarters ending at least 90 days earlier (and no more than 200 days before that), using the figures as later filed, including any restatement, and value them at that day's close, adjusted for later share splits and spin-offs so that price and share count are on the same basis. A wide enough gap is a long or a short for one quarter (growth 10 points; margin and return on equity 5 points; a PEG under 0.75 or over 3), measured on total return against the S&P 500. The rules were set before the test. No trading or borrowing costs; today's list of companies. Not investment advice. All companies and the results across them.

Compare with peers

Head to head: CIEN vs VSAT ANET vs CIEN CIEN vs FFIV

More: Communications Equipment stocks compared, Technology sector, rankings of US companies

Figures from Ciena's SEC filings (10-K and 10-Q), retrieved October 20, 2026. How we read and check them: methodology and data sources. Not investment advice. Back to Ciena.