Financial Desk Team 
Sentiment analysis uses natural language processing, text analysis and computational linguistics to systematically identify, extract, quantify and study affective states and subjective information.
It is an important component of AI trading systems.
Businesses monitor communities, forums, and social media to keep an eye on customer sentiment.
They also track product mentions to understand how their image evolves.
Predictive Capabilities
The combination of high-speed tech and the development of AI has led to an era of fast-paced trading that can be automated.
Machine learning algorithms sift through massive data sets at incredible speeds, recognizing patterns that human traders may miss and making accurate predictions leading to effectively ‘buy’ or ‘sell’ decisions automatically.
These technologies in Quantum AI enable traders to process massive amounts of information, analyzing market prices, news, social media sentiment, and economic indicators in real time.
Traders can also use predictive modelling to assess risks and develop strategies to mitigate them.
Polarity Classification
The opinions of others often play an important role in people’s decision-making process.
Historically, recommendations from friends and family members were an important part of this process but now more people are sharing their opinions online.
This is creating a new source of information that can influence decisions and trading strategies.
Sentiment analysis can help traders understand the prevailing emotions and opinions of market participants.
This can give them a competitive edge by identifying potential new opportunities and highlighting risks in current positions.
Several different algorithms can be used for sentiment analysis including logistic regression and linear models.
The former uses a sigmoid function to classify binary outputs and the latter uses a linear model to predict polarity based on independent variables.
Contextual Sentiment Analysis
With advances in technology and online media platforms, a huge volume of data is generated daily.
This data contains insights that can have a positive impact on business operations.
Sentiment analysis uses this information to understand how market participants feel about a certain asset or market, which can lead to more informed trading decisions.
One of the biggest challenges with sentiment analysis is identifying a potential market turning point.
It’s been found that shifts in sentiment, especially from positive to negative, can cause prices to reverse quickly.
It’s for this reason that integrating the results of this analysis into a trading system is so important.
To do this, the text data is preprocessed using features such as TF-IDF (term frequency-inverse document frequency) and word embeddings.
This can be done by either a rule-based system or through an automatic approach that uses machine learning techniques.
Behavioral Finance
Using sentiment analysis, traders can identify patterns and correlations in sentiment data that may help them predict future market movements.
This capability opens the possibility of applying machine learning models to a whole new range of trading strategies.
Investor sentiment is often irrational, which can create opportunities for traders who are able to anticipate and capitalize on sudden shifts.
Extreme levels of positivity or negativity are usually observed just before major market highs and lows.
Sentiment analysis can be performed on several different types of data, including social media posts and other sources of public opinion.
A common preprocessing technique involves converting text to lowercase, removing punctuation and HTML tags, rearranging words into phrases, and performing tokenization (splitting a text into individual words or ‘tokens’).
Lexicons are also commonly used, containing a list of words and their polarity (positive, negative, or neutral).
Other data processing techniques include word-level polarity detection, word aggregation and classification by industry.
About The Author
Frank Nez 
