NumXL blogs and articles

Read through the articles below to stay up to date with NumXL Pro and topics related to time series, statistics, modeling, forecasting, and many more.

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NumXL New Order System

We are excited to announce a new change to our online order system: we have switched our payment processor to Fast Spring (Santa Barbara, CA USA).

Using Fast Spring’s simple yet secure shopping cart system, we are able to offer NumXL all over the world, in languages and currencies automatically localized to each customer, while fully complying with local tax laws and regulations. Furthermore, more payment methods (e.g. purchase order (PO)), etc.) are now available to you.

How does this affect our customers?

Fast Spring is now considered our vendor of record, so invoices are issued by Fast Spring and charges will appear on your bill as: FS* spiderfinancial.

Aside from that, Spider Financial stands behind each sale made on its behalf. We continue to provide an unconditional 30-day money back guarantee for all purchases, and to offer the same discount programs (e.g. student, non-profit/academic, or volume).

For more details, check out our online sales policy.

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Data plot for the spot weekly average of ultra low sulfur diesel in Nine(9) EIA PADD regions

Making Sense of Diesel Prices

In this case, we examine the highway retail price ($/Gallon) for “No.2 Ultra Low Sulfur (0-15 ppm) Diesel” in the EIA nine (9) PADD regions and carry on principal component analysis in an attempt to find a minimal subset of the principal components that capture (or explains) the variation (spreads) in prices across different regions with a minimal loss of information.

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CAPM

Calculating CAPM Beta

In this paper, we will apply simple linear regression to calculate the CAPM beta for two technology stocks: Microsoft (MSFT) and IBM, then validate the model’s assumptions, identify influential data-points (e.g. outlier), ensure structural stability over the data sample, and make adjustments.

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Featured image for NumXL Affiliate and Agent Program Launch!

NumXL customers’ reviews

We’d love to hear your ideas and experience with NumXL and our support. To keep the reviews objective and let us truly assess where we stand in terms of service quality, we are asking you to leave anything special aside from from honest opinion of our product and services.

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