125
125
Exposure and turnover limits are available against both Non margin adjustable additional base capital (NMABC) and MABC, but as the name suggests, NMABC is not adjusted against margin requirements whereas MABC is used for meeting margin requirements. If a particular amount is payable as margin on a day, it is first adjusted against the MABC available. Balance margin, if any, is required to be paid in cash. To the extent that MABC is adjusted against margins, it will not be available for exposure/turnover purposes. The MABC available for exposure will therefore fluctuate daily depending on how much of it has been utilized against margins.
142
548
Converse: If the diagonals of a quadrilateral are congruent and bisect each other, then the quadrilateral is a rectangle. Given: Quadrilateral ABCD with diagonals , . and _ bisect each other Show: ABCD is a rectangle Because the diagonals are congruent and bisect each other, . Using the Vertical Angles Theorem, AEB CED and BEC DEA. So ∆AEB ∆CED and ∆AED ∆CEB by SAS. Using the Isosceles Triangle Theorem and CPCTC, 1 2 5 6, and 3 4 7 8. By the Angle Addition Postulate each angle of the quadrilateral is the sum of two angles, one from each set. For example, mDAB = m1 + m8. By the addition property of equality, m1 m8 m2 m3 m5 m4 m6 m7. So by substitution mDAB mABC mBCD mCDA. Therefore the quadrilateral is equiangular. Using 1 5 and the Converse of AIA, . Using 3 7 and the Converse of AIA, . Therefore ABCD is an equiangular parallelogram, so it is a rectangle by definition of rectangle.