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REFRhistorical intraday data

ListedResearch Frontiers IncNasdaq

Research Frontiers Inc (REFR) is a common stock listed on Nasdaq. REFR has 5,827 trading days on file, from September 10, 2003 to November 9, 2026, with 2,005,881 trades. There are 353,770 1-minute bars on file.

On file

First day
2003-09-10
Last day
2026-11-09
Trading days
5,827
Trades
2,005,881
1-minute bars
353,770
Bars, about
5.5 MB
Trades, about
27 MB
Quotes, about
72 MB

Sizes are approximate: this ticker’s share of the Parquet files.

Trading history

Trades per calendar year. Busiest year: 2026, with 363,629 trades over 214 trading days.

Symbols get reused, so the history under REFR is not always one company.

Sample rows

REFR1-minute bars, 2026-11-09, Eastern Time
REFR 1-minute bars. Time is Eastern Time, prices are in USD.
Time (ET)OpenHighLowCloseVolumeTrades
09:300.3920.3920.3920.3921672
09:320.41380.41380.41380.41385561
09:390.4249490.4249490.4249490.4249495001
09:410.40.40.40.42001
09:450.40.40.40.41191

REFR by year

YearTrading days on fileTrades
20037911,323
200425232,505
200525221,516
200625135,946
2007251134,137
200825342,834
200925218,370
201025227,942
201125251,985
201225027,960
201325273,843
201425283,559
201525249,133
201625241,635
201725032,479
201825139,773
2019252190,227
2020253266,191
2021252242,073
202225150,026
202325047,093
202425258,813
202525062,889
2026214363,629