TECHM.NS vs. COALINDIA.NS

Last updated Jun 5, 2026

TECHM.NS (Tech Mahindra Limited) and COALINDIA.NS (Coal India Limited) are both stocks. TECHM.NS operates in Information Technology Services (Technology), while COALINDIA.NS operates in Thermal Coal (Energy). Over the past 10 years, TECHM.NS returned 14.12%/yr vs 13.01%/yr for COALINDIA.NS. At a 0.14 correlation, their price movements are largely independent.

Performance

TECHM.NS vs. COALINDIA.NS - Performance Comparison

The chart below illustrates the hypothetical performance of a ₹10,000 investment in Tech Mahindra Limited (TECHM.NS) and Coal India Limited (COALINDIA.NS). The values are adjusted to include any dividend payments, if applicable.

Returns By Period

In the year-to-date period, TECHM.NS achieves a -6.51% return, which is significantly lower than COALINDIA.NS's 22.31% return. Over the past 10 years, TECHM.NS has outperformed COALINDIA.NS with an annualized return of 14.12%, while COALINDIA.NS has yielded a comparatively lower 13.01% annualized return.

TECHM.NS

• 1D: 1.02%
• 1M: 2.42%
• YTD: -6.51%
• 6M: -4.80%
• 1Y: -1.69%
• 3Y*: 13.72%
• 5Y*: 11.70%
• 10Y*: 14.12%

COALINDIA.NS

• 1D: 1.98%
• 1M: 1.91%
• YTD: 22.31%
• 6M: 28.75%
• 1Y: 30.64%
• 3Y*: 36.93%
• 5Y*: 36.67%
• 10Y*: 13.01%

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

TECHM.NS vs. COALINDIA.NS - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023	2022	2021	2020	2019	2018	2017
TECHM.NS Tech Mahindra Limited	-6.51%	-4.06%	37.78%	29.88%	-40.54%	90.80%	32.94%	7.70%	46.72%	5.54%
COALINDIA.NS Coal India Limited	22.31%	11.34%	8.22%	82.15%	71.44%	21.13%	-25.79%	-9.99%	-0.13%	-6.83%

Correlation

The correlation between TECHM.NS and COALINDIA.NS is 0.11, which is low. Their price movements are largely independent, making them effective diversification partners.

	Correlation
Correlation (1Y) Calculated over the trailing 1-year period	0.11
Correlation (3Y) Calculated over the trailing 3-year period	0.18
Correlation (5Y) Calculated over the trailing 5-year period	0.19
Correlation (10Y) Calculated over the trailing 10-year period	0.16
Correlation (All Time) Calculated using the full available price history since Nov 8, 2010	0.14

Return for Risk

TECHM.NS vs. COALINDIA.NS — Risk / Return Rank

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

TECHM.NS

TECHM.NS Risk / Return Rank: 36
TECHM.NS Sharpe Ratio Rank: 38
TECHM.NS Sortino Ratio Rank: 33
TECHM.NS Omega Ratio Rank: 32
TECHM.NS Calmar Ratio Rank: 39
TECHM.NS Martin Ratio Rank: 39

COALINDIA.NS

COALINDIA.NS Risk / Return Rank: 80
COALINDIA.NS Sharpe Ratio Rank: 80
COALINDIA.NS Sortino Ratio Rank: 77
COALINDIA.NS Omega Ratio Rank: 77
COALINDIA.NS Calmar Ratio Rank: 82
COALINDIA.NS Martin Ratio Rank: 84

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.

TECHM.NS vs. COALINDIA.NS - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for Tech Mahindra Limited (TECHM.NS) and Coal India Limited (COALINDIA.NS). 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.

	TECHM.NS	COALINDIA.NS	Difference
Sharpe ratio: Return per unit of total volatility	-0.06	1.41	-1.47
Sortino ratio: Return per unit of downside risk	0.09	2.13	-2.04
Omega ratio: Gain probability vs. loss probability	1.01	1.28	-0.27
Calmar ratio: Return relative to maximum drawdown	-0.07	2.98	-3.05
Martin ratio: Return relative to average drawdown	-0.13	8.36	-8.49
Data is calculated on a 1-year rolling basis and updated daily. The trend shows the change in the indicator over the past month.

TECHM.NS vs. COALINDIA.NS - Sharpe Ratio Comparison

The current TECHM.NS Sharpe Ratio is -0.06, which is lower than the COALINDIA.NS Sharpe Ratio of 1.41. The chart below compares the historical Sharpe Ratios of TECHM.NS and COALINDIA.NS, calculated using daily returns over the previous 12 months. A higher Sharpe Ratio indicates better risk-adjusted performance relative to the risk-free rate.

Sharpe Ratios by Period

	TECHM.NS	COALINDIA.NS	Difference
Sharpe Ratio (1Y) Calculated over the trailing 1-year period	-0.06	1.41	-1.47
Sharpe Ratio (5Y) Calculated over the trailing 5-year period	0.43	1.30	-0.87
Sharpe Ratio (10Y) Calculated over the trailing 10-year period	0.50	0.46	+0.04
Sharpe Ratio (All Time) Calculated using the full available price history	0.41	0.34	+0.06

Drawdowns

TECHM.NS vs. COALINDIA.NS - Drawdown Comparison

The maximum TECHM.NS drawdown since its inception was -89.43%, which is greater than COALINDIA.NS's maximum drawdown of -64.65%. Use the drawdown chart below to compare losses from any high point for TECHM.NS and COALINDIA.NS.

Drawdown Indicators

	TECHM.NS	COALINDIA.NS	Difference
Max Drawdown Largest peak-to-trough decline	-89.43%	-64.65%	-24.78%
Max Drawdown (1Y) Largest decline over 1 year	-24.69%	-10.27%	-14.42%
Max Drawdown (3Y) Largest decline over 3 years	-29.15%	-30.84%	+1.69%
Max Drawdown (5Y) Largest decline over 5 years	-46.57%	-30.84%	-15.73%
Max Drawdown (10Y) Largest decline over 10 years	-46.57%	-58.80%	+12.23%
Current Drawdown Current decline from peak	-15.90%	0.00%	-15.90%
Average Drawdown Average peak-to-trough decline	-31.31%	-22.64%	-8.67%
Ulcer Index Depth and duration of drawdowns from previous peaks	13.43%	3.66%	+9.77%

Volatility

TECHM.NS vs. COALINDIA.NS - Volatility Comparison

Tech Mahindra Limited (TECHM.NS) has a higher volatility of 11.85% compared to Coal India Limited (COALINDIA.NS) at 5.91%. This indicates that TECHM.NS's price experiences larger fluctuations and is considered to be riskier than COALINDIA.NS based on this measure. The chart below showcases a comparison of their rolling one-month volatility.

Volatility by Period

	TECHM.NS	COALINDIA.NS	Difference
Volatility (1M) Calculated over the trailing 1-month period	11.85%	5.91%	+5.94%
Volatility (6M) Calculated over the trailing 6-month period	22.19%	19.42%	+2.77%
Volatility (1Y) Calculated over the trailing 1-year period	26.13%	21.78%	+4.35%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	27.49%	28.72%	-1.23%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	29.04%	28.80%	+0.24%

Dividends

TECHM.NS vs. COALINDIA.NS - Dividend Comparison

TECHM.NS's dividend yield for the trailing twelve months is around 3.03%, less than COALINDIA.NS's 5.48% yield.

Position	TTM	2025	2024	2023	2022	2021	2020	2019	2018	2017	2016	2015
COALINDIA.NS Coal India Limited	5.48%	6.64%	6.77%	6.52%	10.22%	11.98%	14.40%	2.77%	9.87%	7.13%	9.13%	6.28%
TECHM.NS Tech Mahindra Limited	3.03%	2.83%	2.52%	3.46%	4.72%	2.51%	3.08%	1.84%	1.94%	1.79%	2.45%	1.15%

Financials

Frequently Asked Questions

Can I hold both TECHM.NS and COALINDIA.NS in my portfolio?

TECHM.NS and COALINDIA.NS have a correlation of 0.11, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.