--- license: mit language: - en size_categories: - 100K= 2023` | | benchmark | 1000 | held-out subset of test, balanced across buckets | ## Four QA buckets (same construction across snapshots) - **`forward_synthetic`** — questions generated from the prepared remarks by an LLM (Qwen2.5-32B-Instruct-GPTQ-Int4), with answer = extracted evidence span. The LLM sees an **anonymised** version of the remarks (`[COMPANY]`, `[TICKER]` placeholders) to remove generator lookahead, but the **final training row uses the un-anonymised remarks** — the real company name is restored before the row enters the mixture. PIT-4B therefore trains on the natural transcript text, never on placeholder tokens. - **`forward_natural`** — actual analyst question from Q&A, paired with embedding-selected paragraphs from the prepared remarks as context, answer = echo-stripped management response. No anonymisation in the pipeline (the analyst question came from the transcript itself, not from an LLM). - **`inverse_natural`** — given a management response, generate the question (uses template rotation: "What was the analyst asking about?", …). Trains the model to ground responses back to questions. No anonymisation. - **`unanswerable`** — questions generated by an LLM (on anonymised remarks) that *cannot* be answered from the transcript; answer is a fixed refusal string. Training context is the un-anonymised prepared remarks. Trains the model to abstain. Bucket distribution in `202212/train`: - `forward_synthetic`: 141665 (74.8%) - `unanswerable`: 17992 (9.5%) - `forward_natural`: 16776 (8.9%) - `inverse_natural`: 12929 (6.8%) ## Format Each snapshot subfolder contains two parallel formats per split: - `sft_*.jsonl` — flat record: `transcript_id, transcript_date, source_type, context, question, answer, question_type, n_words_total` - `messages_*.jsonl` — chat-format: `id, training_type, messages=[{"role":"user",...}, {"role":"assistant",...}], source, bucket` The chat format is what the training script consumes; the flat format is for inspection / dataset analytics. Only `sft_*.jsonl`, `benchmark_1k.jsonl`, and `grpo_subset.jsonl` are published — the `messages_*.jsonl` files are derivable from them via the training pipeline's renderer. ## PIT discipline PIT-4B-FT snapshots are pretrained on a chronologically-filtered corpus to remove future knowledge by construction. We extend that discipline to fine-tuning: - Train uses only transcripts dated **before** the snapshot's cutoff year. - Val is the cutoff year; test is strictly after. - Splits are chronological — never random. The generator LLM that produced `forward_synthetic` questions has lookahead bias by itself, but it generates only **questions + evidence pointers**, never answers; and the prepared-remarks input was anonymised before generation. So each produced row carries no future information. ## Trained model See [`jdecim/SFT_202212-earnings-sft`](https://huggingface.co/jdecim/SFT_202212-earnings-sft) for the adapter trained on snapshot `202212`. ## License MIT.