Method 1 (calculation method before version 4.2)

_W1and _W2 represent the value of the securities account/portfolio at time _t1 and _t2respectively.

The following problem arises: In the event that _E2 is a deposit valued at a price other than the daily closing price of _t2 , the difference between the valuation price and the daily closing price on day _t2 is included in the yield calculation.