PortfoliosLab logoPortfoliosLab logo

Documentation

Upgrade your plan
IYZ vs. COHR
Performance
Return for Risk
Drawdowns
Volatility
Dividends

IYZ vs. COHR

Last updated Jun 14, 2026

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

Performance

IYZ vs. COHR - Performance Comparison

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

Loading charts...

Returns By Period

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

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%

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%
*Multi-year figures are annualized to reflect compound growth (CAGR)

IYZ vs. COHR - Yearly Performance Comparison

2026 (YTD)202520242023202220212020201920182017
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%
COHR
Coherent, Inc.		108.61%94.84%117.62%24.02%-48.63%-10.04%125.60%3.73%-30.86%58.35%

Correlation

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

Compare stocks, funds, or ETFs

Search for stocks, ETFs, and funds for a quick comparison or use the comparison tool for more options.

iShares U.S. Telecommunications ETF

Coherent, Inc.

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

Return for Risk

IYZ vs. COHR — Risk / Return Rank

Compare risk-adjusted metric ranks to identify better-performing investments over the past 12 months.
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
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
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.

IYZ vs. COHR - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for iShares U.S. Telecommunications ETF (IYZ) and Coherent, Inc. (COHR). 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.

IYZCOHRDifference
Sharpe ratioReturn per unit of total volatility
3.02
5.14

-2.12

Sortino ratioReturn per unit of downside risk
3.95
3.90

+0.05

Omega ratioGain probability vs. loss probability

1.52

1.54

-0.02

Calmar ratioReturn relative to maximum drawdown

6.54

14.28

-7.74

Martin ratioReturn relative to average drawdown

25.99

39.14

-13.15

IYZ vs. COHR - Sharpe Ratio Comparison

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

Loading charts...

Drawdowns

IYZ vs. COHR - Drawdown Comparison

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

Loading charts...

Drawdown Indicators

IYZCOHRDifference

Max Drawdown

Largest peak-to-trough decline

-77.11%

-80.89%

+3.78%

Max Drawdown (1Y)

Largest decline over 1 year

-8.62%

-26.52%

+17.90%

Max Drawdown (3Y)

Largest decline over 3 years

-13.85%

-54.85%

+41.00%

Max Drawdown (5Y)

Largest decline over 5 years

-39.74%

-62.87%

+23.13%

Max Drawdown (10Y)

Largest decline over 10 years

-39.74%

-72.22%

+32.48%

Current Drawdown

Current decline from peak

-4.77%

-9.81%

+5.04%

Average Drawdown

Average peak-to-trough decline

-40.10%

-35.02%

-5.08%

Ulcer Index

Depth and duration of drawdowns from previous peaks

2.17%

9.66%

-7.49%

Volatility

IYZ vs. COHR - Volatility Comparison

The current volatility for iShares U.S. Telecommunications ETF (IYZ) is 8.76%, while Coherent, Inc. (COHR) has a volatility of 27.87%. This indicates that IYZ experiences smaller price fluctuations and is considered to be less risky than COHR based on this measure. The chart below showcases a comparison of their rolling one-month volatility.

Loading charts...

Volatility by Period

IYZCOHRDifference

Volatility (1M)

Calculated over the trailing 1-month period

8.76%

27.87%

-19.11%

Volatility (6M)

Calculated over the trailing 6-month period

15.61%

57.45%

-41.84%

Volatility (1Y)

Calculated over the trailing 1-year period

18.65%

73.72%

-55.07%

Volatility (5Y)

Calculated over the trailing 5-year period, annualized

18.88%

61.62%

-42.74%

Volatility (10Y)

Calculated over the trailing 10-year period, annualized

19.30%

56.55%

-37.25%

Dividends

IYZ vs. COHR - Dividend Comparison

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

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

IYZ and COHR 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, IYZ dropped -77.11% vs COHR's -80.89%.

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.

Portfolio Optimizer

Find the right allocation for IYZ and COHR

Add both to a portfolio and optimize allocations for your target — whether that's maximizing returns, minimizing drawdowns, or balancing risk across holdings.

Open Portfolio Optimizer