diff --git a/src/mwfin/__main__.py b/src/mwfin/__main__.py
index d009636..89d39d6 100644
--- a/src/mwfin/__main__.py
+++ b/src/mwfin/__main__.py
@@ -1,19 +1,15 @@
 import logging
 import asyncio
-import csv
 import json
 from argparse import ArgumentParser
 from pathlib import Path
-from typing import Dict
 
-from .functions import get_all_financials, ResultDict
-from .constants import END_DATE, MAIN_LOGGER_NAME, DEFAULT_CONCURRENT_BATCH_SIZE
+from .functions import get_all_financials
+from .constants import MAIN_LOGGER_NAME, DEFAULT_CONCURRENT_BATCH_SIZE
 
 
 log = logging.getLogger(MAIN_LOGGER_NAME)
 
-JSON_EXT, CSV_EXT = '.json', '.csv'
-
 TICKER_SYMBOL = 'ticker_symbol'
 QUARTERLY = 'quarterly'
 BATCH_SIZE = 'concurrent_batch_size'
@@ -40,14 +36,13 @@ def parse_cli() -> dict:
         type=int,
         default=DEFAULT_CONCURRENT_BATCH_SIZE,
         help="If multiple ticker symbols are passed, the company financials can be scraped concurrently. "
-             "This argument determines how many datasets are scraped concurrently at any moment in time. "
-             "By default, they are scraped sequentially."
+             "This argument determines how many companies are scraped concurrently at any moment in time. "
+             "By default, they are scraped sequentially (i.e. a batch size of 1)."
     )
     parser.add_argument(
         '-f', f'--{TO_FILE.replace("_", "-")}',
         type=Path,
-        help="Writes results to the specified destination file. If omitted results are printed to stdout. "
-             "Depending on the file name suffix, the output format can be either as CSV or in JSON."
+        help="Writes results to the specified destination file. If omitted results are printed to stdout."
     )
     parser.add_argument(
         f'--{JSON_INDENT.replace("_", "-")}',
@@ -76,15 +71,6 @@ def configure_logging(verbosity: int) -> None:
         root_logger.setLevel(logging.WARNING)
 
 
-def write_to_csv(data: Dict[str, ResultDict], file_obj) -> None:
-    writer = csv.writer(file_obj)
-    for statement_key, statement_dict in data.items():
-        end_dates = statement_dict.pop(END_DATE)
-        writer.writerow([statement_key] + list(end_dates))
-        for key, values in statement_dict.items():
-            writer.writerow([key] + list(str(val) for val in values))
-
-
 async def main() -> None:
     args = parse_cli()
     configure_logging(args[VERBOSE])
@@ -95,11 +81,6 @@ async def main() -> None:
         print(json.dumps(data, indent=args[JSON_INDENT]))
         return
     with open(path, 'w') as f:
-        if path.suffix.lower() == CSV_EXT:
-            write_to_csv(data, f)
-            return
-        if not path.suffix.lower() == JSON_EXT:
-            log.warning(f"Extension '{path.suffix}' unknown; using JSON format")
         json.dump(data, f, indent=args[JSON_INDENT])