Chrome : Buying anything seems to result in the resource not being bought and the current banked amount to reduce to -<whatever amount it was supposed to cost>. Note I'm not saying that it subtracts that amount. For instance, 216 banked, click to buy a 100 cost under managed -> results, item not bought, bank goes from 216 to -100 (instead of subtracting the value it is setting it to the subtracted amount).