1) Overpaid players on high salaries 2) Leave selling players at the very end of transfer window 3) Club not knowing what their priorities are during a transfer window by planning beforehand 4) Being too greedy for wanting higher valuation price on average players or selling players bellow their market rate 5) Letting players hold the club to ransom by giving them game time just to make them happy 6) Using the lack of players leaving as an excuse for not signing more players (justarsenal.com)
The current share price is slightly above the average historical valuation price of $ 87.09 across all of the metrics. (seekingalpha.com)
There is a belief in equilibrium prices, i.e., there exists an efficient market whose pricing represents a true valuation price which will change only as the market obtains and digests new information. (mjwhitman.pressbooks.com)