All ExperienceCompleted Research Internship
Remote Research InternApr 2026 – Jul 2026·Remote · Singapore

Nanyang Technological University (NTU), Singapore

Research conducted within the SenticNet Group·Under the guidance of: Zihao Huang
Research Internship Report TitleSource-Grounded Financial Question Answering Using Multimodal Knowledge Representations and Comparative RAG Architectures

Worked within the SenticNet Group under the guidance of Zihao Huang on source-grounded financial question answering, studying how different Retrieval-Augmented Generation (RAG) architectures retrieve and use financial evidence for complex reasoning.

The work combined multimodal financial information from earnings-call transcripts and investor presentations with structured knowledge representations and a controlled evaluation framework.

Research Question
“How can heterogeneous financial disclosures be represented, retrieved, and evaluated while preserving source-grounded evidence for complex financial reasoning?”

Research Focus

AREA 01

Comparative RAG Architectures

Implemented and compared multiple retrieval paradigms for source-grounded financial question answering, including dense vector, graph-enhanced, Knowledge Graph-based, and higher-order hypergraph-based approaches.

VectorRAGDense vector retrieval baseline
LightRAGDual-level graph-augmented retrieval
Deterministic KG-RAGSchema-constrained entity-relation graph retrieval
Financial HyperGraphRAGHigher-order multi-entity event hyperedges
AREA 02

Multimodal Financial Knowledge

Worked with complementary financial evidence from earnings-call transcripts and investor presentation slides, preserving links between source material, extracted information, and provenance.

AREA 03

Structured Retrieval & Evaluation

Developed a structured evaluation workflow to examine retrieval quality, contextual relevance, evidence sufficiency, answer quality, semantic agreement, and engineering behavior across the evaluated RAG architectures. Comparative evaluation was performed across retrieval quality, contextual quality, evidence sufficiency, answer quality, semantic agreement, and engineering behavior.

Event-Centric Knowledge Representation

Financial events were extracted and structured to support graph-based and higher-order representations, providing a common foundation for Knowledge Graph and Hypergraph-based retrieval. Financial events combine entities, financial metrics, temporal information, numerical values, and source evidence.

Research Direction Note: Investigated higher-order event representations as a research direction for complex financial reasoning, rather than a finalized production system.
Technical Areas
RAGFinancial QAVector RetrievalGraph-Enhanced RetrievalKnowledge GraphsMultimodal RetrievalSource GroundingFinancial Event ExtractionStructured Evaluation