Which of the following statements is false? when two stocks are perfectly negatively correlated, it becomes possible to hold a portfolio that bears absolutely no risk. we say a portfolio is long those stocks that have negative portfolio weights. the efficient portfolios are those portfolios offering the highest possible expected return for a given level of volatility. the lower the correlation of the securities in a portfolio the lower the volatility we can obtain.

Oerstman, inc. uses a standard costing system and develops its overhead rates from the current annual budget.the budget is based on an expected annual output of 120,000 units requiring 480,000 direct labor hours.(practical capacity is 500,000 hours)annual budgeted overhead costs total $772,800, of which $556,800 is fixed overhead.a total of 119,300 units, using 478,000 direct labor hours, were produced during the year.actual variable overhead costs for the year were $260,400 and actual fixed overhead costs were $555,450.required: 1. compute the fixed overhead spending variance and indicate if favorable or unfavorable.2. compute the fixed overhead volume variance and indicate if favorable or unfavorable.