TJGC Group is trading 6.14% up in pre-market at $27.85, versus its September 25 close of $26.24; no new company-specific announcement explaining the September 28 move was identified. - The previously announced buyback authorization was issued September 24 and does not require the company to purchase shares. - Bitcoin is down 2.17% and Ethereum 1.80% since the prior close; broader U.S. futures are also lower, so neither backdrop clearly explains the gain.