An eight-month average as a monthly gate for high-yield bonds

A single average as the only baseline

The case study treats an eight-month simple moving average of monthly closes as the sole quantitative baseline for deciding whether a high-yield bond fund is in a buy state or a sell state.

Price above the average is a buy state. Price below it is a sell or cash state.

How entry, exit, and standing aside are defined

Entry is defined as a monthly close above the eight-month average, with purchase on the following day. Exit is defined as a monthly close below that average.

The source argues that high-yield bond prices tend to persist from one period to the next, which is why a trend filter is offered as a natural fit for that market.

Monthly closes as the sampling calendar

Monthly rather than daily evaluation is presented as the device that removes many intra-month whipsaws from the same moving-average rule.

Seasonal trading, as used here, is that monthly sampling calendar. Entry, exit, and abstention decisions are generated only on period closes, so the holding period is the month, not the daily path inside it.

The downward cross as the stand-aside rule

Mean reversion, as used here, is a procedure that waits for price to fall back through the defined average and then stands aside or exits.

The crossing itself is the testable signal. It is not treated as a forecast of fair value.

What the source tabulated

A tabulated signal list in the source shows alternating buy and sell states, including a buy still open at the last monthly close of the illustrated window.

The archive records a comparison of that timed series with uninterrupted holding of the same fund.