Aula 14 - Risco de ativos - Risco de mercado - Curso BNB
New Section
The section discusses the concept of risk in personal asset management, focusing on risk-free assets and credit risks.
Understanding Risk-Free Assets
- Risk-free assets are typically government securities considered low-risk due to the government's ability to manage debt through currency issuance or bond rollovers.
- Credit risk refers to the possibility of default when lending money, contrasting with risk-free government securities.
Types of Assets and Risks
- Private securities like CDB, LCI, LCA, and debentures carry credit risks as banks or companies may default.
- Higher risks often yield higher returns; stocks involve market risk due to price volatility.
Understanding Market Risks
Market risks relate to asset price fluctuations over time, impacting investment returns.
Market Volatility
- Market risk stems from asset price oscillations; higher volatility implies greater risk.
- Longer investment horizons increase market risk exposure due to economic uncertainties.
Principle of Dominance in Asset Selection
The principle emphasizes maximizing returns while minimizing risks in selecting investments.
Maximizing Returns
- Comparing assets A and B shows that choosing B offers equal returns with lower risk, aligning with the dominance principle.
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In this section, the speaker discusses the concept of risk and return in investment portfolios.
Understanding Risk and Return
- Risk-return relationship: Comparing investments A and C for the same risk level, investment A offers higher returns.
- Risk measurement: Standard deviation is a key measure of market risk, indicating volatility in prices. More assets lead to reduced portfolio risk.
- Diversification impact: Increasing the number of assets in a portfolio decreases overall risk. Owning a single stock poses high risk.
- Portfolio diversification: Buying more assets progressively lowers portfolio risk. The speaker illustrates how risk decreases with asset diversification.
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This section delves into systematic and unsystematic risks in investment portfolios.
Systematic vs. Unsystematic Risks
- Systematic vs. unsystematic risks: Systematic risks affect the entire market (e.g., pandemics), while unsystematic risks are specific to individual companies.
- Unsystematic risk reduction: Diversifying across multiple stocks reduces company-specific risks.
- Systematic risk explanation: Systemic risks like global events cannot be diversified away, impacting all assets simultaneously.
- Diversification impact on risks: Unsystematic risks decrease with diversification, while systematic risks persist regardless of asset numbers.
New Section
The speaker emphasizes understanding and visualizing different types of investment risks for exam preparation.
Exam Preparation Insights
- Importance of notes: Encourages viewers to take notes on concepts like dominance principle, free-risk assets, credit-risk assets, and portfolio diversification for exams.
- Revision advice: Reiterates key points on maximizing returns while minimizing risks through dominance principle and diversification strategies.
New Section
In this section, the speaker discusses the calculation of systematic risk using beta and its implications on portfolio returns.
Understanding Systematic Risk
- Beta, also known as the coefficient beta, is used to calculate systematic risk.
- Different betas (0, 0.7, 1, 1.5) are associated with varying levels of portfolio returns.
- Comparing the return of a portfolio to that of the market portfolio helps determine systematic risk.
- The market portfolio consists of a significant number of actively traded stocks like the Bovespa index.
New Section
This part delves into interpreting beta values and their impact on portfolio performance.
Interpreting Beta Values
- A beta value less than 1 indicates a defensive asset, while greater than 1 signifies an aggressive asset.
- Beta values help assess risk levels in a portfolio compared to market returns.
- A beta value equal to zero implies a return equivalent to the risk-free rate for an asset.
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The speaker explains how to calculate beta using covariance and variance formulas.
Calculating Beta
- A beta less than 1 suggests lower risk and a defensive portfolio.
- Betas greater than 1 indicate higher-risk portfolios with potentially higher returns.