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COHR vs. IYZ
Performance
Return for Risk
Drawdowns
Volatility
Dividends

COHR vs. IYZ

Last updated Jun 13, 2026

COHR (Coherent, Inc.) is a stock, while IYZ (iShares U.S. Telecommunications ETF) is Communications Equities fund tracking the Dow Jones U.S. Select Telecommunications Index. Over the past 10 years, COHR returned 34.35%/yr vs 5.94%/yr for IYZ. At a 0.45 correlation, their price movements are largely independent.

Performance

COHR vs. IYZ - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in Coherent, Inc. (COHR) and iShares U.S. Telecommunications ETF (IYZ). The values are adjusted to include any dividend payments, if applicable.

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Returns By Period

In the year-to-date period, COHR achieves a 108.61% return, which is significantly higher than IYZ's 29.57% return. Over the past 10 years, COHR has outperformed IYZ with an annualized return of 34.35%, while IYZ has yielded a comparatively lower 5.94% annualized return.

COHR

1D
5.90%
1M
0.67%
YTD
108.61%
6M
115.90%
1Y
397.65%
3Y*
107.95%
5Y*
40.59%
10Y*
34.35%

IYZ

1D
1.27%
1M
2.31%
YTD
29.57%
6M
32.60%
1Y
58.27%
3Y*
28.37%
5Y*
7.57%
10Y*
5.94%
*Multi-year figures are annualized to reflect compound growth (CAGR)

COHR vs. IYZ - Yearly Performance Comparison

2026 (YTD)202520242023202220212020201920182017
COHR
Coherent, Inc.		108.61%94.84%117.62%24.02%-48.63%-10.04%125.60%3.73%-30.86%58.35%
IYZ
iShares U.S. Telecommunications ETF		29.57%29.28%20.53%3.90%-30.29%11.69%4.13%16.14%-8.59%-11.86%

Correlation

The correlation between COHR and IYZ is 0.54, which is moderate. They share some common price drivers but move independently often enough to provide real diversification benefit when combined.

Correlation
Correlation (1Y)
Calculated over the trailing 1-year period

0.54

Correlation (3Y)
Calculated over the trailing 3-year period

0.49

Correlation (5Y)
Calculated over the trailing 5-year period

0.54

Correlation (10Y)
Calculated over the trailing 10-year period

0.48

Correlation (All Time)
Calculated using the full available price history since May 26, 2000

0.45

The correlation between COHR and IYZ has been stable across timeframes, ranging from 0.45 to 0.54 - a consistent structural relationship.

Compare stocks, funds, or ETFs

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Coherent, Inc.

iShares U.S. Telecommunications ETF

Often compared with COHR:
COHR vs. LITECOHR vs. OLEDCOHR vs. LSCCCOHR vs. AAOICOHR vs. ^GSPCCOHR vs. ACMRCOHR vs. CRWD
Often compared with IYZ:
IYZ vs. XTLIYZ vs. VOXIYZ vs. XLCIYZ vs. IXPIYZ vs. IYRIYZ vs. FBMPXIYZ vs. SPY

Return for Risk

COHR vs. IYZ — Risk / Return Rank

Compare risk-adjusted metric ranks to identify better-performing investments over the past 12 months.
COHR
COHR Risk / Return Rank: 9797
Overall Rank
COHR Sharpe Ratio Rank: 9999
Sharpe Ratio Rank
COHR Sortino Ratio Rank: 9595
Sortino Ratio Rank
COHR Omega Ratio Rank: 9595
Omega Ratio Rank
COHR Calmar Ratio Rank: 9999
Calmar Ratio Rank
COHR Martin Ratio Rank: 9999
Martin Ratio Rank
IYZ
IYZ Risk / Return Rank: 9393
Overall Rank
IYZ Sharpe Ratio Rank: 9494
Sharpe Ratio Rank
IYZ Sortino Ratio Rank: 9292
Sortino Ratio Rank
IYZ Omega Ratio Rank: 9191
Omega Ratio Rank
IYZ Calmar Ratio Rank: 9494
Calmar Ratio Rank
IYZ Martin Ratio Rank: 9595
Martin Ratio Rank
The rank (0–100) shows how this investment's returns compare to the risk taken. Higher = better. Based on the past 12 months of data, combining Sharpe, Sortino, and other metrics used by quantitative funds and institutional investors.

COHR vs. IYZ - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for Coherent, Inc. (COHR) and iShares U.S. Telecommunications ETF (IYZ). Risk-adjusted metrics are performance indicators that assess an investment's returns in relation to its risk, enabling a more accurate comparison of different investment options.

Values are calculated on a 1-year rolling basis and updated daily. Risk-adjusted metrics are more stable over longer periods — use the period switch above to explore them.

COHRIYZDifference
Sharpe ratioReturn per unit of total volatility
5.14
3.02

+2.12

Sortino ratioReturn per unit of downside risk
3.90
3.95

-0.05

Omega ratioGain probability vs. loss probability

1.54

1.52

+0.02

Calmar ratioReturn relative to maximum drawdown

14.28

6.54

+7.74

Martin ratioReturn relative to average drawdown

39.14

25.99

+13.15

COHR vs. IYZ - Sharpe Ratio Comparison

The current COHR Sharpe Ratio is 5.14, which is higher than the IYZ Sharpe Ratio of 3.02. The chart below compares the historical Sharpe Ratios of COHR and IYZ, calculated using daily returns over the previous 12 months. A higher Sharpe Ratio indicates better risk-adjusted performance relative to the risk-free rate.

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Drawdowns

COHR vs. IYZ - Drawdown Comparison

The maximum COHR drawdown since its inception was -80.89%, roughly equal to the maximum IYZ drawdown of -77.11%. Use the drawdown chart below to compare losses from any high point for COHR and IYZ.

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Drawdown Indicators

COHRIYZDifference

Max Drawdown

Largest peak-to-trough decline

-80.89%

-77.11%

-3.78%

Max Drawdown (1Y)

Largest decline over 1 year

-26.52%

-8.62%

-17.90%

Max Drawdown (3Y)

Largest decline over 3 years

-54.85%

-13.85%

-41.00%

Max Drawdown (5Y)

Largest decline over 5 years

-62.87%

-39.74%

-23.13%

Max Drawdown (10Y)

Largest decline over 10 years

-72.22%

-39.74%

-32.48%

Current Drawdown

Current decline from peak

-9.81%

-4.77%

-5.04%

Average Drawdown

Average peak-to-trough decline

-35.02%

-40.10%

+5.08%

Ulcer Index

Depth and duration of drawdowns from previous peaks

9.66%

2.17%

+7.49%

Volatility

COHR vs. IYZ - Volatility Comparison

Coherent, Inc. (COHR) has a higher volatility of 27.87% compared to iShares U.S. Telecommunications ETF (IYZ) at 8.76%. This indicates that COHR's price experiences larger fluctuations and is considered to be riskier than IYZ based on this measure. The chart below showcases a comparison of their rolling one-month volatility.

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Volatility by Period

COHRIYZDifference

Volatility (1M)

Calculated over the trailing 1-month period

27.87%

8.76%

+19.11%

Volatility (6M)

Calculated over the trailing 6-month period

57.45%

15.61%

+41.84%

Volatility (1Y)

Calculated over the trailing 1-year period

73.72%

18.65%

+55.07%

Volatility (5Y)

Calculated over the trailing 5-year period, annualized

61.62%

18.88%

+42.74%

Volatility (10Y)

Calculated over the trailing 10-year period, annualized

56.55%

19.30%

+37.25%

Dividends

COHR vs. IYZ - Dividend Comparison

COHR has not paid dividends to shareholders, while IYZ's dividend yield for the trailing twelve months is around 1.53%.

PositionTTM20252024202320222021202020192018201720162015
COHR
Coherent, Inc.		0.00%0.00%0.00%0.00%0.00%0.00%0.00%0.00%0.00%0.00%0.00%0.00%
IYZ
iShares U.S. Telecommunications ETF		1.53%2.04%1.94%2.27%2.55%2.51%2.60%2.36%2.15%3.54%2.27%1.98%

Frequently Asked Questions

COHR and IYZ have a correlation of 0.54, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.

COHR has higher volatility (27.87%) compared to IYZ (8.76%). In terms of maximum drawdown, COHR dropped -80.89% vs IYZ's -77.11%.

COHR currently has the higher Sharpe Ratio (5.14 vs 3.02), meaning it's delivered slightly more return per unit of risk over the trailing 12 months. However, this ranking shifts over time - use the Risk/Return Score above for a more comprehensive view that combines Sharpe, Sortino, and other measures used by quantitative funds.

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