Change in ASP vs. prior quarter -1.4 % -0.7 % -1.6 % -0.8 % -1.1 %
(1) Operating margin for the second fiscal quarter of 2013 includes a
$1.8 millionstock compensation credit related to performance-based stock compensation for certain former executives, following a determination that achievement of the three-year performance targets was no longer probable (see our Note 8 to our consolidated condensed financial statements). Operating margin for the second fiscal quarter of 2012 includes a $12.2 milliongain recognized on the sale of a vacated property in Belgium(see our Note 4 to our consolidated condensed financial statements). (2) End-of-period backlog for the second fiscal quarter of 2013 reflects a total of $15.5 millionrelated to the backlog of MCB Industrie S.A.as of the date of acquisition.
See "Financial Metrics by Segment" below for net revenues, book-to-bill ratio, and gross profit margin broken out by segment.
Our results for the second fiscal quarter of 2013 were impacted by the improving business environment in most of our markets, including increased demand from distributors which led to an increase in revenues compared to the prior fiscal quarter and the prior year period. Orders from distributors continuing to restock in response to improved end-customer demand contributed to the continued strong book-to-bill ratio and led to an increase in the backlog versus the prior fiscal quarter and prior year periods. Average selling prices continue to decline primarily due to our commodity semiconductor products. Temporary issues including start-up inefficiencies at a major foundry, inventory valuation effects, increased palladium prices, unfavorable changes in other metals prices, and unfavorable product mix shifts in the second fiscal quarter of 2013 resulted in a decrease in gross margins compared to the prior fiscal quarter and prior year period.
The book-to-bill ratio continued to be strong in the second fiscal quarter of 2013, decreasing slightly to 1.08 from 1.14 in the first fiscal quarter of 2013.
The book-to-bill ratios for distributors and original equipment manufacturers ("OEM") were 1.13 and 1.01, respectively, versus ratios of 1.24 and 1.04, respectively, during the first fiscal quarter of 2013.
For the third fiscal quarter of 2013, we anticipate revenues between
Financial Metrics by Segment
The following table shows net revenues, book-to-bill ratio, gross profit margin, and segment operating margin broken out by segment for the five fiscal quarters beginning with the second fiscal quarter of 2012 through the second fiscal quarter of 2013 (dollars in thousands): 2nd 3rd 4th 1st 2nd Quarter Quarter Quarter Quarter Quarter 2012 2012 2012 2013 2013 MOSFETs Net revenues
$ 111,363 $ 123,325 $ 104,156 $ 100,888 $ 115,563