JOYY vs. SERV

Last updated Jun 5, 2026

JOYY (JOYY Inc) and SERV (Serve Robotics Inc) are both stocks. JOYY operates in Internet Content & Information (Communication Services), while SERV operates in Specialty Industrial Machinery (Industrials). Over the past year, JOYY returned 54.89% vs -30.22% for SERV. At a 0.18 correlation, their price movements are largely independent.

Performance

JOYY vs. SERV - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in JOYY Inc (JOYY) and Serve Robotics Inc (SERV). The values are adjusted to include any dividend payments, if applicable.

Returns By Period

In the year-to-date period, JOYY achieves a 9.13% return, which is significantly higher than SERV's -18.93% return.

JOYY

• 1D: 1.60%
• 1M: 15.80%
• YTD: 9.13%
• 6M: 13.51%
• 1Y: 54.89%
• 3Y*: 39.48%
• 5Y*: 3.71%
• 10Y*: —

SERV

• 1D: 2.12%
• 1M: -7.93%
• YTD: -18.93%
• 6M: -35.27%
• 1Y: -30.22%
• 3Y*: —
• 5Y*: —
• 10Y*: —

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

JOYY vs. SERV - Yearly Performance Comparison

	2026 (YTD)	2025	2024
JOYY JOYY Inc	9.13%	63.93%	32.10%
SERV Serve Robotics Inc	-18.93%	-23.11%	-46.00%

Correlation

The correlation between JOYY and SERV is 0.31, which is low. Their price movements are largely independent, making them effective diversification partners.

	Correlation
Correlation (1Y) Calculated over the trailing 1-year period	0.31
Correlation (All Time) Calculated using the full available price history since Mar 8, 2024	0.18

The correlation between JOYY and SERV shifts across timeframes, from 0.18 (all time) to 0.31 (1 year), reflecting how their relationship changes across market environments.

Fundamentals

Market Cap JOYY : $3.44B SERV : $633.67M
EPS JOYY : $4.34 SERV : -$2.07
PS Ratio JOYY : 1.63 SERV : 107.37
PB Ratio JOYY : 0.53 SERV : 1.99
Total Revenue (TTM) JOYY : $2.19B SERV : $5.19M
Gross Profit (TTM) JOYY : $773.31M SERV : -$22.91M
EBITDA (TTM) JOYY : $190.18M SERV : -$138.16M

Return for Risk

JOYY vs. SERV — Risk / Return Rank

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

JOYY

JOYY Risk / Return Rank: 82
JOYY Sharpe Ratio Rank: 83
JOYY Sortino Ratio Rank: 84
JOYY Omega Ratio Rank: 82
JOYY Calmar Ratio Rank: 79
JOYY Martin Ratio Rank: 79

SERV

SERV Risk / Return Rank: 28
SERV Sharpe Ratio Rank: 27
SERV Sortino Ratio Rank: 32
SERV Omega Ratio Rank: 32
SERV Calmar Ratio Rank: 23
SERV Martin Ratio Rank: 25

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.

JOYY vs. SERV - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for JOYY Inc (JOYY) and Serve Robotics Inc (SERV). 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.

	JOYY	SERV	Difference
Sharpe ratio: Return per unit of total volatility	1.62	-0.34	+1.96
Sortino ratio: Return per unit of downside risk	2.64	0.05	+2.59
Omega ratio: Gain probability vs. loss probability	1.32	1.01	+0.32
Calmar ratio: Return relative to maximum drawdown	2.63	-0.54	+3.17
Martin ratio: Return relative to average drawdown	6.15	-0.87	+7.02
Data is calculated on a 1-year rolling basis and updated daily. The trend shows the change in the indicator over the past month.

JOYY vs. SERV - Sharpe Ratio Comparison

The current JOYY Sharpe Ratio is 1.62, which is higher than the SERV Sharpe Ratio of -0.34. The chart below compares the historical Sharpe Ratios of JOYY and SERV, 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

	JOYY	SERV	Difference
Sharpe Ratio (1Y) Calculated over the trailing 1-year period	1.62	-0.34	+1.96
Sharpe Ratio (5Y) Calculated over the trailing 5-year period	0.06	—	—
Sharpe Ratio (All Time) Calculated using the full available price history	0.12	-0.20	+0.33

Drawdowns

JOYY vs. SERV - Drawdown Comparison

The maximum JOYY drawdown since its inception was -83.52%, smaller than the maximum SERV drawdown of -92.72%. Use the drawdown chart below to compare losses from any high point for JOYY and SERV.

Drawdown Indicators

	JOYY	SERV	Difference
Max Drawdown Largest peak-to-trough decline	-83.52%	-92.72%	+9.20%
Max Drawdown (1Y) Largest decline over 1 year	-20.97%	-56.28%	+35.31%
Max Drawdown (3Y) Largest decline over 3 years	-33.72%	—	—
Max Drawdown (5Y) Largest decline over 5 years	-67.31%	—	—
Current Drawdown Current decline from peak	-42.15%	-66.34%	+24.19%
Average Drawdown Average peak-to-trough decline	-56.13%	-61.72%	+5.59%
Ulcer Index Depth and duration of drawdowns from previous peaks	8.95%	34.80%	-25.85%

Volatility

JOYY vs. SERV - Volatility Comparison

JOYY Inc (JOYY) and Serve Robotics Inc (SERV) have volatilities of 18.58% and 18.21%, respectively, indicating that both stocks experience similar levels of price fluctuations. This suggests that the risk associated with both stocks, as measured by volatility, is nearly the same. The chart below showcases a comparison of their rolling one-month volatility.

Volatility by Period

	JOYY	SERV	Difference
Volatility (1M) Calculated over the trailing 1-month period	18.58%	18.21%	+0.37%
Volatility (6M) Calculated over the trailing 6-month period	25.95%	59.65%	-33.70%
Volatility (1Y) Calculated over the trailing 1-year period	34.09%	89.39%	-55.30%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	59.61%	189.89%	-130.28%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	61.39%	189.89%	-128.50%

Dividends

JOYY vs. SERV - Dividend Comparison

JOYY's dividend yield for the trailing twelve months is around 6.23%, while SERV has not paid dividends to shareholders.

Position	TTM	2025	2024	2023	2022	2021	2020
JOYY JOYY Inc	6.23%	4.35%	0.00%	3.07%	6.46%	4.48%	1.02%
SERV Serve Robotics Inc	0.00%	0.00%	0.00%	0.00%	0.00%	0.00%	0.00%

Financials

Frequently Asked Questions

Can I hold both JOYY and SERV in my portfolio?

JOYY and SERV have a correlation of 0.31, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.

Which is riskier, JOYY or SERV?

JOYY has higher volatility (18.58%) compared to SERV (18.21%). In terms of maximum drawdown, JOYY dropped -83.52% vs SERV's -92.72%.

Which has better risk-adjusted returns?

JOYY currently has the higher Sharpe Ratio (1.62 vs -0.34), 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.