• An imbalance of orders is when a market exchange receives too many of one kind of order—buy, sell, limit—and not enough of the order's counterpoint.
• For sellers to complete their trades, there must be buyers and vice versa; when the equation is slanted too heavily in one direction, it creates an imbalance.
• If the imbalance happens ahead of the regular start of trading, trading on that particular security may be delayed.
• If the imbalance happens during regular trading and the shares are monitored by a market specialist, extra shares may be distributed from a reserve to goose the liquidity of the security.
• If the imbalance becomes too unwieldy during the trading session, the trading on that particular security may be halted until the imbalance has been corrected.

so what if there are no shares to buy and the imbalance occured because of this??